Family of 4 stayed here in April for 9 days between house moves.
Location was perfect and the flat was bright, spacious and airy with 2 good sized double beds. It has great wifi and the bathroom has a good power shower. The heating is super powerful so not needed most of the time.
Kitchen is well equiped with everything you would need and there are some excellent cafes not even a minute's walk away.
Worth noting that the keys(there is only one set) have to collected and dropped off at a shop by hampstead heath station which is a 7 minute walk away.
Overall the flat is great but I do have to mention that the ceilings are paper thin and the family living upstairs had a tendency to run around until quite late into the night. I'm sure this is not an issue for all especailly if only here for a day or two but it became an issue as we stayed for over a week.