We love the fact that after about 4 months of occasional use it still looks like new with no sagging whatsoever. That being said, if you are looking for soft, cozy  seating this is definitely neither. As for hosting the occasional overnight guest, keep in mind that it is  kind of compact, you could probably fit one person under 5'5" comfortably. We bought it to use it in an  office/guest room but unfortunately it is to short and hard to have anybody sleep on it so we use it as stylish seating for the occasional coffee breaks. 

Pros: Easy assembly, coil system, stylish. 
Cons: Hard seating