Five of us stayed at Yael's house - 2 kids and 3 adults and it was absolutely perfect for us. It's very spacious, with huge rooms. The master bedroom on the top floor is total luxury, with the most comfortable bed I think I've ever slept in!!
The position was great too; just up the road from Primrose Hill and an easy stroll to Belsize Park tube. The house itself is in a very quiet street, but has all the things you need just around the corner. We particularly loved the cafe nearby for breakfast.
I highly recommend Yael's house for a super-comfortable stay, and really appreciate her wonderful hospitality. We would certainly love to return!