I was in London for 4 days, 2 of which I spent at Serhat's apartment and the other 2 of which I spent at a more expensive 4 star hotel. I much preferred my stay at Serhat's apartment. The view from his apartment was incredible and was one of the highlights of the trip for me. The subway line is a 2 minute walk away and all the major tourist destinations can be reached within 30 minutes. Many places are even within walking distance. Both Serhat and the concierge are very helpful and can help you with any questions you may have.