I've stayed just one night but the experience was good. A part from a misunderstanding on the right room (my mistake, I've just left my luggage in another room), the entrance has been fine and Arune arranged things immediately as soon as she realized my error. the communication with her, even if we never met, was perfect.
The room is simple but clean, not big but with enough space to be comfortable. The bed is also correct. The situation is very good, quite close to Waterloo station, so less than 30 minutes walk from some of the high spots of London.
The less positive points for me would be the bathroom (clean but a bit old) and the price which I find a little bit expensive for a private room, but I guess that's London, so probably not expensive for that city. Overall, good experience!