I stayed at Nathan and Magda's place with a friend for one week, and that was an absolutely great experience! Nathan and Magda are really kind, talkative, helpful and flexible. They make you feel like you were home (the people who stayed at their place were also really nice)! The room was spacious and clean (so were the bed linen and the towels, which were just washed when we arrived). Besides, you get everything you need for a good breakfast. The apartment is well located (less than 5 minutes from the underground, and you can even go to the Tower on foot). To conclude, I'll definitely recommend you to stay there for your next trip to London!