Christina & Leslie are amazing hosts, incredibly helpful and thoughtful - and their place is gorgeous! We stayed in the Canal Room for one weekend and wished we could have stayed longer. The room is just as nice as the pictures convey, and the shower room takes the luxury to another level (this is England, after all!).
Location-wise it was great for us, with a nice walk along the canal to the newly re-invigorated Kings Cross area and the main train/tube stations. I'd definitely recommend staying with Christina & Leslie - and we'll certainly come back next time we're in London.