We, me and my girlfriend, were in London for five nights and Carl's place was pretty much perfect! It had a great connection to the Central Line which directly leads to he heart of London.
The place was super clean and tidy and Carl even had some bottled water and some stuff for breakfast in the fridge. Also there was some chocolate as a welcome gift and really just felt like a hotel.
Carl himself is super nice and communication was a breeze. He always responses fast and gives useful tips upon your arrival in London.
All in all we really loved our stay and would come back any time.
Jan & Silvia