Let me start by thanking everyone here for so much amazing mattress advice. I read pretty much every post and got some great advice from many, but especially u/the_leviathan711

Background/details: king size bed for 2 side/back sleepers with herniated disks and tons of joint pain. 5'10" 165lbs and 5'3" 156lbs. Do not like the feel of latex, have, in the past, been really happy with an IKEA hybrid that, sadly, broke down too quickly. Tested out lots of mattresses at a local store to figure out what feel we preferred. Loved the Tempur Adapt hybrid but have had a bad experience with the off-gassing, so didn't want one. More concerned about return policy than anything else. Considered DIY and got great suggestions for a build. Worried about the returning/exchanging of individual components, so didn't go that route. Locally, Costco has the best returns, so we looked at what they had available and chose the mattress that most closely resembled a combo of the DIY specs and the Tempur Adapt. The winner was the Casper Hybrid and it has been FABULOUS!

No pain when sleeping on side, wake up without joint stiffness, sleep well. Frankly, it feels like a miracle to not be in pain in the morning and to not toss and turn all night. The edge support is good, very little motion transfer and does not sleep hot (all things I was concerned about). Also, ZERO off-gassing.

Hope this helps someone!

So I'm a side sleeper with a very firm mattress that has been screwing up my shoulder/upper back for almost a year; I tested out a casper hybrid mattress in store and it felt very soft/plush but still with some support.

(Ive tried several toppers for my firm mattress before including the casper one and sink right through / hate them!)

I know the costco casper hybrid version is different (and some reddit reviews says its firm, which I likely dont want) but Im wondering if anyone knows the actual difference between these 2 models, besides the price...

any advice or knowledge would be much appreciated!

Researching a new mattress and realized I wanted to share my experience with our current Casper Hybrid. Bf (6ft, 175lbs - combo sleeper, mostly back/side) & I (5'8, 130lbs - combo sleeper mostly side/stomach) started sleeping on a new Casper Hybrid mattress (innerspring and memory foam combo) in summer 2021 using a new IKEA Malm platform bed (meets support requirements).

At first I was like "ooh, cozy" the memory foam provided a deceiving/alluring squish. With time, I have noticed that the squish is to its detriment. The memory foam sleeps HOT, we both wake up with limbs that have fallen asleep during the night, and as a side sleeper my hips suffer most of all.

The memory foam starts out the night *seeming* supportive enough but with the warmth it holds through the night hours, it actually collapses and my hips drive down into the spring portion as well as the curvature of my spine totally bottoming out so there is no real support in the waist region. I wake up in pain/feeling stiff most nights sleeping on this mattress and I don't even use it full time!! (For the record, I spend other nights on a 10yo Saatva that is a little firm at times but MASSIVELY more supportive and doesn't create pain/sag OR on an old (15yo+?) unknown brand innerspring that has started to sag with gel foam topper from Walmart which is a great supplemental layer in the meantime).

The Casper Hybrid Queen was about $1700 at purchase and I absolutely would not purchase it again, especially at that price. I have aches from hypermobility and need adequate support. Most nights I also place a pillow between my knees for spinal alignment and if I'm not with my partner I prop up a pillow behind my back as well. If I had to sleep on the Casper Hybrid more than 7 nights a month I would probably demand that we either replace or get a latex topper/etc.

For me personally sleeping on memory foam at all is a nuisance - again limbs fall asleep and perceived support drops off/collapses during the night. I guess here's a good time to mention that I also spent the night on a TempurPedic so the harrowing sensation of being swallowed by the bed/swimming in mayonnaise and not being able to get out is one I would definitely avoid too.

If you're like me, maybe you've also started to research beds with latex components (cooler sleeping, more consistently supportive than memory foam). It's hard to find a company with good consistent products but I'll continue the hunt. I hope this info is helpful for anyone considering this mattress and identifying if it will meet their needs/be compatible with their body type.