I bought the largest size and it’s been in use a few weeks now, and my English Pointer is loving the room to stretch out.  It’s fluffy and the material is sturdy but not stiff.   My only reason for 4 stars instead of 5 - the center is much fluffier than the edges.  My fur baby doesn’t seem to mind this and seems quite comfy, based upon how much she dreams and snores while in it!  Lol.