Our family of 6 (4 adults, 1 child and 1 infant) stayed there very comfortably.
Note- this is a walk up apartment and there are no lifts. We had no issues with this.
The location is spectacular but it does get loud at night - it's in a prime party location! So bring your earplugs!
We loved how spacious the place was and that fabulous ice cream shop just downstairs.