Legacy Premier Support 14" Hybrid Mattress

Out of the 9 or so Costco mattresses (Lessa Legends, Novaform, Sealy Posturepedics, S&F, and BeautyRest) I've tried so far, I like this one the most (and hate the Novaform Legacy with a passion). It's weird because my first Costco mattress was the S&F Kirkland Medium pillowtop, and it was mid. I could be remembering incorrectly, or my back is washed after all the mattresses since it's been a while, but I recall it initially being too firm for me and disliking the very divoted (?) patterned top. Either way, it doesn't matter because it ended up sagging/dipping near the hip area after a year. Now that I've slept 2 nights on the S&F Kirkland Firm tight-top version, I can only wish it won't dip like the previous S&F, because it has everything I like: med-firm (imo it's 7.5 or 8/10), the best edge support (out of all tried beds), not-boiling-alive-inducing materials, and excellent motion isolation (might be even better than the S&F Med). The last point is highly desirable because I sleep with my bf (6'0, 200+ lbs), and I'm 95 lbs, so most beds make me roll to one side. The only cons I can think of (which also applies to the Med-ver) are: it's too heavy for me to change sheets, and it's 14'' tall.

The Legacy is a weird mattress that was extremely firm, even for me, who prefers firmer mattresses, but too soft on the edges. The first night was just ok because it's a bed from a box, so it suggested (NOT REQUIRED) 48 hrs for it to expand fully, but the second night was a completely different story. At first, I thought it was because of my weight/stature, but it also caused the same problems for my bf--extreme soreness in the quads and calves when we lay down--and it got progressively worse throughout the night. It felt like we were losing circulation in our legs. After a few more nights, what bothered us was the patterned top because it was steep, frequent, and confusing to lie on: I couldn't properly guide my back or hips to an even/flat-enough surface to sleep on the same plane as the other parts of my body (unlike a usual simple pattern like dots), which I infer, forced my body to scrunch/tighten up to hold a decent posture. So, it was like my body was constantly fighting between relaxing and tensing. In short, my body did not lie evenly on the x and y axis, and that made the mattress feel artificially firmer. As for edge support, I noticed that in all the Novaforms I've tried, it's not what you're buying the bed for. I thought the firmness in the Legacy would be good enough, but if you look at Costco's diagram, there's only foam on the surrounding edges (NOT COILS). Also, logically, idk why I didn't reason that if a mattress can be rolled into a box, how could the edge support be good? I guess the novelty got to me lol. As for the PROS, the Legacy sleeps very cool, has good-quality handles, and it was decent on the first night. The top layer's material also felt soothing to touch and was my favorite part of the bed, but overall, it didn't work well for us.