Douglas was great in communication and the place is really well equipped (including an iron!) The place was clean and tidy and the rooms are a great size. The beds particularly comfortable. Check in was made easy and for the price and location I can't recommend the place enough for access to the ExCeL.
Might add that we had a bit of a nightmare dealing with another host in London who misrepresented the listing and then tried to refuse a refund - stay clear of "managed apartments" and go with honest folk, like Douglas!