It's my fault that I didn't pay attention but I thought this is memory foam otherwise I wouldn't have ordered it, as 600$ seems quite overpriced for some cut foam & cover. Other furniture may also be foam but at least they have some skeleton/structure, this is just foam! Because it's a regular foam, I'm not sure if it's going to keep its shape in the long run or how comfortable it's going to be as a bed.
It also doesn't look as neat as the pictures, because the cover doesn't quite fit perfectly at the seams, especially for the big pieces. For me, the pieces expanded immediately (no 20 minute wait, which is the case with memory foam) and getting the cover on for the main sofa was not that easy.