My husband and I stayed in this apartment for 9 days. We never got to meet Geoff, but his assistant Attila met us and assisted with the check in process (and he waited for us after a lengthy journey into London from Stansted - thanks again!!!)
Firstly, the good things:
1) Distance to train stations - the apartment is almost in the middle of Angel and Kings Cross station, and both are very easily walkable (kings cross will take about 3 mins longer).
2) Apartment itself - great furnishings, awesome bed, effective heaters, extensive appliances and cutlery, lots of space. Felt like home away from home.
3) Location - aside from being so close to train stations, the apartment is also close to heaps of restaurants, cafes and shops. It also felt relatively safe at night and we never had any problems walking home.
Unfortunately, the not so great things:
1) The bathroom doesn't have any ventilation or an exhaust fan, meaning it gets reaaaaally steamy and uncomfortable when showering. This may just be a personal preference though.
2) We also noticed that because of the lack of ventilation, the bathroom had some sort of odd smell coming from it.. Not unbearable, but like.. Musk?
3) Location - there are 3 bars within walking distance of the apartment, which means that unfortunately on Fridays and Saturdays there can be some noise heard. This is probably only an issue if you open the windows, which we did to sleep as it could get quite stuffy in the apartment. We also heard quite a number of sirens at night/early morning, which sometimes woke us up. This however has nothing to do with or was a fault of the host, and may not affect you if you're not a light sleeper!