Mark's place is in a great central location and was very convenient for attending a conference at UCL. It was a good amount of space for two friends to stay, and we found Mark to be very responsive whenever we had any issues or questions. (I would recommend bringing earplugs if you're a light sleeper at all, as someone nearby played very loud music every morning during my stay. This only affected one of the two bedrooms.) Overall, it was a comfortable accommodation, and I would definitely recommend Mark's place for your stay!