We enjoyed our stay and do recommend others to stay there as well. Below are a few pointers from our stay.
The good: Peaceful neighborhood, a block away from a convenience store and a cafe called the Hot Pot cafe which offers pretty good English breakfasts, ~8min walk to a Tesco Express, ~15min walk from a Tesco superstore located near Lewisham station, ~7min walk to Elverson station, effective heating in all rooms, almost instantaneous hot water from the showers which was fantastic in the cold weather, working heated towel racks, washing machine, and dryer which made laundry a breeze, more than enough power outlets, a comfortable bed in the master bedroom
The not-so-good: Insufficient amount of toilet paper(There were only 5 rolls for the 3 of us for 8 days. We ended up purchasing our own at the nearby convenience store for ~1.50pounds), the bed in the second bedroom was too firm for my liking, ~45min journey by train to central London, the walk from Elverson station consists of a steep incline(If you're carrying quite a bit of luggage or are getting on with the years, it might be better to walk from Lewisham. It's a little further, but is a relatively straight and flat path.)
All in all, if you don't mind traveling a bit to get to and from central London, Philip's place is a great choice. A comfortable and peaceful place to wind down after a day of traveling around London.