My siblings, my sister's boyfriend and I went to London to visit the Harry Potter studios in Watford! We stayed at Sean's apartment for two days and would really recommend it. We rented a car at Stansted airport in order to get to Sean's apartment as well as the studios, whereas we took the train to go sightseeing in London.
The apartment was easy to find and we have had a parking spot right in front of it. Sean gave us a lot of tips about train tickets, restaurants, grocery stores and whatever else we needed to know throughout the whole trip. He has been a big help and available whenever needed. We are really glad that we got to stay at his apartment and had a great time in London.
About the apartment: We stayed there with 4 people for two days. It is a nice little apartment and it was very clean. We only had breakfast at the apartment because we were touring around the city and Hogwarts most of the time.
We'd recommend the apartment to everyone who's planning on visiting London for a short trip and, again, are really grateful that we got to stay there.