I stayed 9 days in London. This wasn't the cheapest place I found, but I'm very happy I decided to rent Lesleys flat.
As you can see in the pictures, which are up to date, the kitchen and bathroom are clean and the living room and bedroom are basic, but much bigger than the standard hotel room in central London.
Altough the flat is in a big building, it was pretty quiet, so you'll have a good night rest.
The location is great. Not too far from Kings Cross, where I arrived by Eurostar. Around the corner you can find Farringdon and Chancery Lane station (Central line).
A few places nearby to have breakfast and some nice pubs to have a drink and a chat with locals in the evening.
The only negative remark about the neighbourhood I could make, is that you'll need to search a little further to find a place to have breakfast on sundays.
Communication with Lesley was fast and clear. She waited for me on arrival to hand over the keys and answer any question I had. On the last day of my stay, I could leave whenever I wanted, just dropping the keys in the mailbox.