we were a group of 5 friends, the bedrooms easily accommodated us all.
The shared living room may be more suited to a group of 3 or 4 people max though unless ppl don't mind sitting on the floor. we didn't spend too much time in the house except for sleeping so it didn't bother us too much.
location is really good, quite close to Shibuya, Shinjuku and Roppongi.
people who are taller than 170cm might have issue with low hanging lights and cabinets. One guest who is 184cm had to watch for door frame height as well.
all rooms had some sort of heating so it wasn't too cold in winter time when we went.
toilet is extremely cramped so may be hard for ppl with long legs. women may be able to sit sideways where as males apparently would not be anatomically be able to sit side ways to give themselves more room
at the time we stayed the drain in the shower was very slow to drain so that may be an issue for some who don't want to stand in water.
finally most of the star wars lights and features were not available or working so if that is your only reason for staying you may be disappointed. There were some hangings/pictures up as well as some walls painted as per the pictures but mostly it was just a regular apartment.