Great location. Very close to the tube and convenient for touring London. The room did not have working air conditioning for the week of the stay or for the last guest before us, so be careful if booking during the hot season. The room is above a bar and without the white noise of an AC unit, you can hear everything, including every time someone enters the floor by using the keypad, which makes a preposterously loud tone for each button press.
The shower is among the worst I have ever used. It has precisely two settings: scalding and freezing. Both of these settings have minimal water pressure and volume, even if using aeration. If you leave the temperature set to 3/4 and “eco”, you can get a water temperature approaching something reasonable but if you touch it even a little bit, all bets are off. At one point, the shower had to be reset by flipping the power switch for the shower outside the bathroom. When you get out, you can expect to use on thin, sad towel.
Overall, it was a pleasant stay and not bad for the price. I would stay here again if I had to since it was clean and safe, but would not recommend it to a friend or return if anything else was available. Fixing the AC and the shower, replacing the keypad, and putting more/better towels would ameliorate the problems.