If you want a cheap and basic room then this is the place to stay. But be prepared for some rude and unhelpful staff; possible inconsistencies in room description; not fantastic location.
I experienced a very nice and helpful member of staff when checking in. He spoke English to me and got me into my room slightly earlier than normal checkin. However whilst i was waiting i heard some grumbles from other members of staff around me (i think one was the owner). Seemed they'd cottoned on i was english and made a couple of stupid comments in slovak i think. I ignored them and went to my room. the single room was small but okay - single squeeky bed (take earplugs), shower, toilet, cupboard for hanging clothes, easy chair and small table. it was warm and my room face towards the back of the castle mound so was quiet. But i noticed i had no TV and the description of the rooms said ALL rooms had satellite TV. So i asked another waiter downstairs about the Tv (as reception is not manned fulltime) and he was totally dismissive and gave no explanation and walked away. He was actually quite aggressive and made me feel like a peice of dirt not worth bothering about. I decided not to pursue the TV argument as it was futile and stay without one whilst here. It really is unpleasant to be treated in this unhelpful manner and for this reason alone i would not recommend it and would suggest paying a little extra and staying more central. plus the walk is around 15 minutes from the old town and whilst you can take the longer route along the danube the most direct route is dodging the traffic along the fast duel carriageway just outside. Be prepared to pay 20 euros and more for 1 person for a meal in their restaurant.