This would be a fine room for 2 people, but I don't think it accommodates 4 people very well. The room is large enough and the private bathroom is nice, but one bed was far too small for 2 people. I also wouldn't call the place comfortable; we were told basically to whisper while we were there and were asked to wear slippers everywhere in the home. I have no problem being considerate; it is someone's home after all. It just wasn't comfortable as a guest.
Everything else about the place was good! The metro station is very close and the neighborhood felt safe.