We had an excellent stay with our 2 small children.
Outstanding location close to Kensington Gardens, Portobello Market and 2min away from the tube-station.
Very nice, clean apartment, we felt immediately at home. The alley to the main door in the basement was absolutely not a concern for us.
Efficient check-in and out, very friendly and pro-active host!
Warmly recommend this place and would stay again.