I had an excellent stay at Ian and Elzi's place.
The apartment is very clean with breathtaking views of entire london (including, london eye, big ben etc.). There are great views from the bedroom as well.
The hosts are great and really fun to interact and hang out with. If you are travelling solo, you will not feel alone.
Location is excellent too. I was able to walk to most places within 15-30 mins. Shoreditch (the Brooklyn of London) is a 5 min walk and offers great restaurants, pubs, brunch places, coffee shops and co-working spaces.
Highly recommended and will stay here again if I am in London.