We stayed for 5 nights in Mallorca at this hostel.
First I had a bad impression, because their communication was poor and seemed rude. It might have been the language barrior, but they refused to answer basic questions about our staying.
The room itself was pretty bright, spacious and there was a balcony too, which was amazing. It was clean, although there was no cleaning/option for cleaning during the stay.
The location was very optimal, close to shops, restaurants and the beach, so it was perfect.
The only thing that was bothering is they charged us upon arrival, claiming it was some kind of tax (usually everything should be included in the price or at least indicated). There was a fee for anything, even for wifi and for storage. Looked like they grabbed every chance to charge people for random amounts.
Overall, I would recommend staying there, the room is comfortable and apart from these minor issues, our stay was okay.