Overall I was happy with my stay.
Pros:
* the management agency is super responsive and accommodating, 5 stars;
* location is extremely quiet;
* Swiss Cottage and Belsize Underground stops are 10min away;
* Belsize commercial district is under 5min away;
* the wifi is good enough for video, 8mbs down / 2mbps up;
* dishwasher and washer/dryer work well;
* the bed is comfy (but I weigh under 70kg).
Cons:
* It is a penthouse insofar that it’s under the roof. Hit my head multiple times on an unexpected ceiling.
* fit and finish is rough, some exposed pipes, windows that don’t entirely close, closet and cubby holes that don’t entirely close, some sloppy grout work, bathtub has a crack in the external plastic;
* received two notices from the neighbors about dripping water (forwarded them to the management agency);
* shower head is extremely weak although the tub fills reasonably given its enormous size.