I live in London and my family was coming over from Spain to visit. They stayed with Theodora and her lovely cat Valentino and their experience was great!
They had a double bed and a single bed for 3 of them, more than enough, the room has everything you need, even a desk, and you can lock it with your key as well (not that you need to as the house is really safe). Everything was really clean and nice. Theodora was lovely, you have breakfast in the morning. Also Crouch End is a great área of London.
My family said they'll definitely come back there when they visit again :)