We stayed for two nights (two adults and two children) and we loved the flat and the location!
It felt like a home, and it was great to have a kitchen available which is funtional (i.e. you don't have to buy salt or olive oil or find that there's no corkscrew).
It's a great location as well, very close to Victoria and yet very quiet, practically zero traffic noise. Also a plus were the pubs and restaurants in the immediate area.
All in all, I highly recommend it!