Ron's place is great! I didn't meet him since my friend arrived first and checked in, but she reported that he was just marvelous and available for questions and orientation. He left town after that, but checked in with us a couple times to make sure everything was fine. And wow, was it fine. Great kitchen, great sleeping (quiet), great hanging out space.
Location is perfect, if you want to be on the Heath (so great!) or North London, or really buses and tube and overground train connections are good for anywhere in London. Very convenient and a little out of the center, so as to be in London but not surrounded by noise and bustle. Love it; my favorite place to stay in this wonderful city.
Only one thing: if you have prams, children, etc., the entry is very very tight and the stairs are steep. We had visitors with children and it was a jigsaw puzzle to get everything in and up the stairs. But, that is just something to know.