My friend and I stayed at Mario's for three days. The location is indeed great and easily accessible by public transport and on foot. The room was spacious and clean, but the space for hanging clothes (dresses and such) was somewhat limited. A mirror would be a valuable addition to the room's design, too ;)
The bathroom and shared facilities were pleasant as well. We especially liked the mattress as it was neither too stiff, nor too soft, and no one felt uncomfortable.
Overall great value for money and location!