We had a good time at Simon's place. The area is very quiet and safe. It's a bit far from central London but you can get a bus (5 min walk) or the tube (10 min walk).
Simon's place is very modern, nice kitchen and wonderful balcony. We came as a family of 4 and it was a bit crowded as we slept on a fold bed in the kitchen.
Simon is very kind and very reactive, the checking in and out were made very easy.