I stayed with Sam for two nights to visit an event. Everything was totally as described. The flat is very clean, the bed was comfortable, and the bath is also modern with a "rain" shower head. The flat is located in a very nice part of Kentish Town, and is easy to reach by public transportation, and I felt very safe to get back there in the night.
Sam is a super nice host, and it was super fun sharing breakfast with him and having a chat or two.
I would stay there again without hesitating for a second.
10 out of 10.