Original Mattress

I've had the same mattress from tuff and Needle since 2016 and I love it. It is on the firmer side. I have their original style mattress. I don't believe you can get it from Costco though but ordering from them is very easy

We got the tuft and needle original about 7-8 years ago and it is still holding up very nicely. I also find it much cooler than most foam mattresses.

We have tuft and needle and like it! We have their basic and their mint. The mint is much softer than the basic depending on what you want!

Just wanted to add my own two cents cuz why not. We just replaced our original Tuft n Needle with the Boring hybrid one week ago. So far, so good. I dunno how much I love a spring mattress but the sleep experience is nice. I thought it would be more durable in the long run than all foam. We got some cheap taller metal frames from amazon and put Bunkie Boards on top for support.

Tuft and Needle. I got the original over 10 years ago and it’s still a great mattress. It’s in the guest bedroom now. I now have the Tuft and Needle Mint on my bed. Both kings. Wife and I love them.

Absolutely hate my Tuft and Needle original mattress and have even had it replaced once under warranty since 2020.

I work for Hamuq (Canadian mattress company), I also spend way too much time talking about mattresses so I’ll just give you my honest take. Under $600 at Costco, all of the ones you listed are memory-foam heavy, which can feel okay at first but often lacks support for combo sleepers, especially when you’re a bit heavier on one side of the bed. Here’s a quick rank for medium-firm feel for side + back sleepers: 1. Tuft & Needle 9.5" — Best all-around choice here * Simpler foam, more responsive, less sink-in feel than the rest * Better for combo sleepers than plush gel/memory options 2. Casper Cooling Select 12" — Good second choice * Slightly more contouring than T&N but still balanced * Cooler feel if that matters 3. Sleep Science Align IQ — Might feel too soft * Euro-top + memory tends to contour deeply → pressure points over time 4. Novaform 14" — Too plush for your “medium-firm” goal * Lots of foam, deep sink, can make alignment worse 5. Comfort Tech Serene Foam II — Very basic * Feels inexpensive and lacking support for most adults General advice: at this price point, strong innerspring/hybrid support isn’t in the list, so focus on the least sinky/most responsive foam model, that’s why I lean toward Tuft & Needle or Casper. If you find these still feel too soft or you really want better spinal support, it’s worth considering something built with zoned support and firmer base layers, the type of thing we focus on at Hamuq, because memory foam alone rarely gives the support combo sleepers need long term. Hope this helps!