Can’t get the family off this couch ! Yes, low to the ground but can easily add to legs but I like as is . Doesn’t bother us.  Not firm, that's why we love it! No backing but the high long back  pillows are sturdy enough to sit up. I expect it to sag where we all lay so planning on turning cushins every so often . No, cannot feel wood on arm rests as
mentioned somewhere... almost 2 inches of cushion.  Fits 2 adults and 9 year old fully laying down. WARNING: you won’t want to get off it!