You might want to check these recent threads:
http://www.flyertalk.com/forum/hilto...-property.html
http://www.flyertalk.com/forum/hilto...la-concha.html
http://www.flyertalk.com/forum/hilto...ht=el+san+juan
I have never stayed in the lanai rooms. Most sofabeds aren't very comfortable, I would not expect these to be any different.