The stay with J & O has been really pleasant. Everything written is excactly as described. Jessica is really helpful both before and during your stay.
A nice bonus is the the, coffee and croissants she provides in the morning.
The appartment is very close to two tubes and lots of buslines. That said we walked a lot arround. The neigbourghood is very charming with several markets.
Would definately recommend it and I'm planning on staying there next time i go to London.