Ann is wonderful. You don't feel like a guest, she will do everything to make you feel at home. If you ask her she will help you to find the best way getting around or recommends you many places you can visit beside the typical tourist stuff. I stayed with her for 7 days and it was a great time.
The room was small but nice and really clean.
Important to know is that it may look far from the city Center when you look it up on a map but believe me it just takes a short time to get into central London.
It's a quiet street but you have everything you need in walking distance or take the bus for around 5 minutes (the bus stop is conveniently 3 minutes from her home)