King Koil SmartLife Lily 2.0 Mattress Reviews (2026)

The Lily 2.0 earns its premium price by solving a specific problem well: two people can choose different comfort settings while the bed continues to adjust under each of them. At a medium setting, it kept the hips and lower back level without blocking the shoulder from settling during side sleep. Motion isolation was its best performance area, so a partner getting in or turning over rarely disturbed the other side. The trade-off is ownership complexity. This is a powered sleep system that requires setup, occasional fine-tuning, and comfort with app or remote controls.

• Who it’s for

  • Couples who want separate comfort control on each side
  • Back-and-side combination sleepers who need steady support as they move
  • Shoppers who value sleep tracking, saved settings, and relaxation features

• Who should skip it

  • Shoppers who want a mattress with no power, pairing, or controls
  • Anyone who needs a very firm edge for sitting and getting dressed
  • Value-focused buyers who will not use the adaptive features

The Lily 2.0 was used nightly for 14 nights as part of our mattress evaluation process, with settings adjusted in small steps before each was held for several nights. Back and side sleeping showed how well the surface maintained support and delivered pressure relief. Cooling was checked during 30-minute still periods in a temperature-stable room. Motion isolation came from repeated partner entries, exits, turns, and three controlled ball drops. Responsiveness was measured after removing a fixed load, while edge support was compared with the same load at the center and near the perimeter. The short test period can show consistency and recovery, but it cannot predict years of service from the air system and electronics.

The Lily 2.0 took several nights to dial in. Its middle setting felt close to 6 out of 10 for firmness, supportive enough for back sleeping but still forgiving at the shoulder when rolling to the side. Moving softer gave the shoulder more room but let the hips settle too far; one step firmer restored better lower-back support without making the top feel hard. Marcus preferred that firmer setting for hip support, while Mia stayed closer to the midpoint for shoulder comfort.

The measurements matched those impressions. After a 10-pound ball was dropped from 6 inches three times, a sensor 24 inches away recorded an average peak of 0.08 g, and noticeable vibration ended in about 0.7 seconds. That strong motion control was easy to feel when two people shared the bed. A 44-pound load also recovered to 90% of its original height in 1.8 seconds, quick enough for smooth position changes even though the foam top has a slight delay.

Cooling was comfortable rather than cold. The surface rose from 70.4°F to 78.8°F during a 30-minute rest, then dropped to 72.7°F within 10 minutes after getting up. Edge support was less impressive: a 200-pound load compressed the surface 3.3 inches near the side, compared with 2.1 inches at the center. Sleeping near the perimeter still felt stable, but sitting in the same spot produced a clear slope.

• What we liked

  • Adaptive support that limits excess hip sink without making the shoulder area rigid
  • Excellent motion isolation for partners on different sleep schedules
  • Noticeable temperature recovery after longer periods of contact

• Who it is best for

  • Couples with different comfort preferences
  • Sleepers who move between back and side positions
  • People who will use the app or remote to save and refine settings

• Where it falls short

  • The price remains high even when a retailer runs a promotion
  • Setup and fine-tuning take more effort than a standard mattress
  • The seated edge compresses more than expected at this price

• Mattress: King Koil SmartLife Lily 2.0
• Price: King Koil currently lists queen models starting at $4,999 in the luxury mattress category; retailer pricing and promotions vary
• Feel: Medium comfort model with adjustable firmness
• Profile: 12 inches
• Type: Adjustable hybrid smart mattress
• Support system: 80 Smart Cells across 8 independently controlled zones
• Core technology: Body sensing that adjusts support as position and pressure change
• Controls: SmartLife app or wired-remote configurations, depending on the retailer package
• Smart features: Sleep tracking, relaxation mode, and a gentle wake feature
• Comfort materials: Cooling cover, Hypergraph memory foam, and HypurGel foam
• Base compatibility: Compatible with adjustable bases
• Trial: Seller-specific; Sit ’n Sleep, for example, advertises a 120-night trial
• Warranty: 25 years total, with full coverage for the first 4 years and prorated coverage afterward
• Current sizes: Queen, King, California King, and split-top variants

Choose the Lily 2.0 if you share a bed with someone who prefers a different feel, move between back and side sleeping, or want support that changes as your weight shifts. A traditional luxury hybrid is easier to own if you dislike bedroom apps, prefer one fixed feel, or need a firmer edge for sitting.

Among current smart beds, the Sleep Number ComfortNext Ultra is the closest similarly priced option for buyers who want Sleep Number’s larger connected ecosystem and a microcoil comfort layer. The Saatva Solaire feels more like a traditional precision-air mattress and offers 50 firmness settings on each side. Neither uses the Lily 2.0’s 80-cell support layout, so the decision comes down to whether you value automatic localized adjustment or a more familiar air-chamber design.

The Lily 2.0 costs more and asks more of its owner than a conventional mattress. Comfort improves after several nights of small adjustments, not after one dramatic setting change. The seated edge is merely adequate, and the powered support system adds pumps, controls, and connections that a standard mattress does not have. Trial terms, remote availability, delivery, and pricing also depend on the retailer. For a guest room or a household that wants one permanent feel, the added technology offers little value.

Sleep Number ComfortNext Ultra: This is the most relevant current Sleep Number comparison at a similar price. It combines adjustable air chambers, foam, and microcoils, and it connects to Sleep Number’s broader app and base ecosystem. Choose it if you want conventional dual-air adjustment and an established connected platform. Choose the Lily 2.0 if localized Smart Cell adjustments and its wave-style relaxation mode matter more.

Saatva Solaire: Solaire provides 50 firmness settings on each side of queen and larger beds, along with in-room setup, a 365-night trial, and a lifetime warranty. Its air-chamber feel is more familiar and its purchase policies are stronger. The Lily 2.0 is the better match for sleepers who want support to adjust across multiple zones as they move.

Eight Sleep Pod 5: Pod 5 is not a mattress. Its cover and hub fit over a bed you already own, adding independent heating and cooling, sleep tracking, and smart alarms. It is the better route if you already like your mattress and temperature is the priority. It cannot replace the Lily 2.0’s adjustable support.

• Hold each setting for several nights before changing it; one-step adjustments are easier to judge.
• Save separate presets for back sleeping and side sleeping.
• Use relaxation mode as part of a wind-down routine rather than leaving it on all night.
• Keep the bedroom temperature steady while comparing comfort settings.
• Change one side at a time in a shared bed so each sleeper can identify what improved.
• Use a breathable protector that does not dull the cooling surface.
• Move a few inches inward before standing if you regularly sit on the edge.
• Confirm the included controls, delivery service, trial, and return fees before ordering.