We stayed in Charlie's flat for 10 days while visiting London, and could not have had a better experience. We had some problems with our flight coming in, but Charlie was perfectly accommodating--we picked up the keys at a shop around the corner, and Charlie had even left some breakfast food for us, which was perfect after our long flight.
Since this was our first trip to London, he was very helpful in guiding us from Heathrow to the flat. He even checked in on us several times over our stay to make sure everything was all right, and was always quick to respond to a message.
The flat was spotless and easy to relax in. My husband had to telecommute several days of our trip, and the wifi was excellent and the table made a nice desk. We loved the giant tub and took many long, hot baths which felt good after waking all day. The bed is comfortable.
The flat is in a clean and quiet,non-touristy neighborhood and a close walk to the Angel station. After spending time in the West End and some other tourist-favorite sites, we were so glad we didn't stay on that side of town! They were crowded and full of gaudy shops. Charlie's place was perfect.
In fact, I'm pretty sure that next time we are in London, we'll plan our trip around the availability of Charlie's flat!