I did not receive an Alwyn Home mattress. I received a BedTech mattress. A few other reviews mentioned this happened to them also. I mean, if you're going to substitute it seems reasonable to update the buyer. I didn't get any notice from Wayfair. So since it was here, and had taken a bit longer to arrive, we put it on the  frame. It is hard memory foam. My last foam mattress was more like a typical mattress. This is hard memory foam. If you sit on the end, it sinks down and has to rebound. It is harder than I would expect from 'ultra plush'. I was imagining something akin to a feather bed top on a foamier, sturdy base. Since it was a hassle to get upstairs and on the bed, and who knows what I would get if I exchanged? A chair? A fiddle? Who knows. I do think I may not trust Wayfair again to send me what I ordered. When I checked BedTech online, they are a bit more expensive than what I paid. Still I researched for hours before ordering, and then I get something else? What?