It's interchangeable so that is a nice feature. It's very comfortable to sleep on, not too bad to sit on,we got extra couch pillows to problem solve.
The color we got was grey but it looks.more bluish than grey so not too happy about that. The parts slide into an interlocking metal bar so you don't need screws.to assemble... My 16, 11and 9 year old put it together. The extra storage is really nice. The box is a bit shallow but still hold a lot. 
It's a small mini sofa.