I'll start with the good stuff. Location is great: the house is on a small, quiet street, but at the same time it's really close to shops, pubs and places of interest.
Problems: the place is extremely small, but I understand it's London, so I was Ok with that. It is also completely underground which also would be ok. However, there is no proper ventilation, so it is extremely damp.
But the biggest issue for was that I was looking for a proper 1 Bedroom place, and it was the reason I rented this flat. This is a studio at best. The bed is located in a little nook with no door between it and the Living Room. So, it is impossible for one person to sleep while the other is working or doing something else. Which was very important to me.