Wave Hybrid is excellent. I needed a bed solution quickly, but still of quality for a family member recovering from surgery. The wave hybrid lived up to its description. The cooling layer keeps the temperature perfect for sleeping. Although it’s softer than my mattress (for back issues), I found it doesn’t bother my back at all and I slept comfortably myself when testing it out. I would rate it 10 stars. Reasonably priced and easy to assemble, although I would recommend installation for anyone needing assistance or in an apartment/ condo it’s heavy to lift. I only had to slide it, no stairs. Bonus, now I can get rid of the guest air mattress that starts to deflate in the middle of the night. Happy guests and happy host. Thank you Casper!