The flat is on the ground floor and basement. AJ met us at the flat and showed us around. It is in a great location - close to the tube, but also close to the canal, so we could walk along the tow-path to Camden lock market (5-10 minutes) and to Regent's Park to the Open Air Theatre.
The flat is as it appears on the website - it's size was reasonable for us as a couple. It is simply furnished. The bed was very comfortable.
AJ was flexible about checkout. Although we left at 11 am, he did say that we could leave later if we needed to - just to let him know the night before. We had a great stay.