Stayed here for 9 nights during the 2012 Sziget festival, a couple.
We had an absolutely terrific stay for many nights. The restaurant has friendly and competent staff, the reception is both efficient, friendly and willing to go out of their way to provide service. We would definitely go back. The cleaners are both helpful and efficient. They also respected the "do not disturb" signs - we both had a bout of the flu and were bed ridden the first three days of the stay and slept all day, but the maids politely knocked to check if we wanted towels or anything else. Excellent!
We can also recommend the restaurant for affordable, high-quality food (Especially the rice-noodles with chicken and soy sauce, yum!) and occasionally some tasteful live music.
We can only point out one minor flaw at all: There was no drain on the bathroom floor (of our room, at least) and the curtain door on the shower is both too narrow and not perfectly aligned on the bottom, so if you shower you'll inevitably get a wet and slippery floor. A very minor problem that is easy to solve by taking the first day's towel and draping it over the edge.