You can book David's flat with your eyes closed! I honestly can't recommend it enough. It looks just as good as the photos, maybe a little bigger, and there was everything we could need : nice towels, basic toiletries, condiments and even some food, USB sockets, fast internet. Beds were comfy and the shower worked a treat.
The location is great too. Dalston has great food and nightlife and it's the perfect base for exploring Hackney and East London (walking distance to Brick Lane, Spitalfields Market, Shoreditch, and several parks featuring an outdoor pool and a little farm).
David's friend handled check-in and he made me feel very welcome even though I was late after waiting for my bag for ages at Heathrow. He and David also replied quickly to any questions.l before and during our stay.
One piece of advice : don't panic if the front door key doesn't work on your first try. It has a "knack" and takes a little bit of getting used to (basically you need to pull the key back about 1 mm before it will turn).