Great little place. Very clean, with little touches like convertors, universal charger, tour books, kettle, some food, dishwasher, clothes washer and detergent and nice bed linens.
Excellent location near the tube, great restaurants and some museums.
Karim is a thoughtful, communicative host.
Even though it is small we had 4 adults there for 2 nights and 2 for 4 more nights and we were all comfortable. We were out and about most of the time anyway. If you are planning on hanging about in the apt a lot then you might want a larger place.
But this location is so central that we were able to take trains everywhere and avoid most taxi and car fees by getting an oyster card and taking the tube. We saved a lot of money that way.