My family and I are in love with this chair and love that it lounges too! No one has slept on it yet but it’s so comfortable to sit on or lounge I can imagine it will be comfortable to sleep on too. It’s firm but comfortable supportive firm so don’t let that stop you unless you only like furniture you sink into. Super easy to switch positions and great for our small living space but big enough that it would look great in any living room. Ordered the dark grey and in my opinion it’s still pretty light. The space in lounge mode is off by about an inch on one side, see picture, but we just won’t leave it in that position.