Marks place is very well located is your visiting London for the first time, we walked a lot and still found the condo very convenient, if you don’t like to walk a short cab (5 min ) everywhere, lots of restaurants and coffee shops around , internet was ok , and kitchen was well stock with cocking utensils, he was very responsive.
Only thing is that elevator stop working our last 2 days and we had to carry on the stairs our luggage when we were leaving, besides that everything perfect!