From the first contact you'll have with him, John is going to be as friendly as helpful. He will provide you with the information you need for your stay in London.
Although his place is not central, it is very accessible, even from Heathrow airport, and facilities are within a walking distance.
The apartment is tidy and offers all the comfort you need: equipped kitchen, storage space, wifi, etc…
John is a considerate host and someone you can rely on as well. He will advise you on the nicest places to go to, depending on your linking. He respects his guests' privacy and is also a great person to have a talk with.
This is definitely the first place you should head to when coming to London.