Had a really great experience staying at Gil's for 3 weeks.
Gil is a very nice host, always available to help you with any issue you may have and for any suggestion.
I worked from home all the time while there and I had a really nice view in front of me and even enough space to train in my room. The kitchenette is very well equipped and the bathroom is new.
The apartments is very well connected to the City Center, both the touristic part and the corporate center: the bus station is just by the building and the Jubilee subway line is very close.
I would recommend the room for both short stays but also a longer period if you need to look for a more permanent accomodation in London