Futons definitely serve a purpose!
Back in my old house, I'd been planning on converting a small upstairs bedroom into a little TV room for myself...and then it suddenly became necessary to babysit my 2 grandchildren for 6 months.
Their dad had to go away for training, & since he and his wife had worked separate shifts, there was no one to watch them while she worked.
A futon was the perfect solution!
Not only was it comfy for their napping and sleepovers, but after they'd left, I was left w/ a comfy 'couch' for the little TV room - which was also used as an occasional guest room.
Just make sure to get a quality mattress/cushion & you'll be all set! 
Muddling through...