My wife and I spent 3 nights at Bart's apartment in London. Let's start with the basic, everything he advertise in his listing is 100% accurate. That alone should be enough to book his place.
And in details, the location is amazing, walking distance to many attractions, and very close to the tube and bus stations. The apartment is super clean, tidy, and very well organized, modern kitchen, anything you need. The room and bed were very comfortable, and we enjoyed a decent sleep after busy days touring the city. Even though the location is central, the place is very quiet. No noise from the street.
On top of that, Bart is just the sweetest guy ever! He was so delighted helping us planning our days, with tons of tips, brochures of places to go, warning from tourist traps and much more. We really felt that we were staying at a friend's place.
You can't go wrong here, highly recommended!