I had a great experience with Rey, he was a very nice person and as there was a strike on the London tube the first night, he helped me to understand what buses to take to go to the places I was most interested.
Also he offered to help me with a last minute issue , but I solved some other way so I didn't need to bother him anymore.
Good place to stay since the tube station is just below his apartment.
Thanks Rey and Ivo, you're the best!