We are a family of 4 (kids 11 and 13). We spent a week on vacation in London. This was exactly the sort of rental we were looking for! We had a wonderful stay and a terrific vacation! It was really nice to be able to come "home" after a busy day sight seeing, and really "flop", where the kids could get away from the grown ups :), and everyone could put their feet up, and really have a break.
Pro's -
Lots of separate sleeping areas (2 bedrooms are on different levels, and then the lounge/family room couch can be used, it is on a third level). So you can really recharge at the end of a busy day.
VERY close to the underground, buses, etc!
Super nice hosts!
Washer/Dryer - NOT like we have in the US, but still it helped a lot.
Fully stocked kitchen, and a small market very close, so you can eat breakfast in, get snacks, etc.
Cons -
Being so close to all the public transit is awesome, but it was noisier than we are used to at home.
This didn't bother us, but in case you missed it in the description - the apartment is one floor up from the street, and then three floors, so lots of stairs, if that isn't your thing.
Thanks for a lovely stay! Thanks for being such wonderful hosts!