Well, if it is anything like the couch in my 250BHS, it is really comfy. Almost more so than the actual bed mattress. lol
I prefer a firmer mattress and that certainly inst the stock bed mattress. The couch though is quite comfortable to stretch out on. I would imagine that they use the same type of cushions on all the trailers.
'09 F-350 6.4l Crew Cab
'10 Komfort Trailblazer T262BSLE