My family of 4 had a great stay in Mark's flat! First, Mark was a fantastic host. He provided very helpful information prior to our trip, including transportation tips, nearby food options, and things to do in the area. He met us at the flat and gave us the tour along with some add'l info of the area.
We LOVED the location. The view from the front of the flat was so nice. We were able to walk to several places: thru South bank to the Eye, the Millennium Bridge, Burough Market, just to name a few. There is a coffee shop right next door. There are also several other coffee, breakfast, and convenience stores nearby.
The flat itself was small, but comfortable. It was great having the two fold-out beds. We put the double in the main area and the single in the kitchen for the kids. For any summer travelers, although no a/c, having the windows open was refreshing. There is also a portable fan in the unit which we used. Note that there is noise from the front of the flat, since you are right on a busy walking path and there is a restaurant right there on the waterfront. White noise and/or ear plugs came in handy. But if closed, the windows blocked out the sounds really well. As for the bathroom, I liked that it had its own entrance (not directly connected to the bedroom). Great water pressure and plenty of hot water.
Would 100% stay here again!