Lovely host, and lovely room with excellent ensuite. Everything I needed conveniently to hand - a small desk, a good light, excellent bed, good heating system, good shower with lots of hot water, quiet and all in my own space. Just be prepared for three quite steep steps before the front door if you have heavy luggage. I had a superb stay.
There's an excellent Sainsburys five minutes walk away, and a small Waitrose a little further. On even a brief acquaintance Muswell Hill could stand as the Notting Hill of North London and would be a great place to take a short break. There's an excellent selection of restaurants nearby, including Japanese and Thai, and a bunch of very decent shops of more than usual interest and quality (and even a small old-fashioned cinema). Tube is seven minutes walk away if you really insist on going into central London. Some wonderful views southwards over London as well, English weather allowing.