This hostel really does tick most of the boxes of a great hostel. The location is great - easy walking distance to the microcentro, and San Telmo is a really atmospheric barrio. The staff all spoke English well, and there was plenty of chill out areas. The hostel was kept really clean and I did enjoy having my bed made for me everyday! I went on both of the free tours that they offered. The tours weren't great, but I appreciated them because they helped me get settled into the city, and meet a few people.
The breakfast was sufficient - toast, 3 types of cereal and, um, cake. The kitchen was way too small, and under equipped to deal with the peak season numbers though. The beds in the dorm were really comfy, however they really need to fix that super squeaky bunk in room 504 (possibly the same one mentioned by a previous reviewer). Also, the shower cubicle was a completely stupid design. They are mixed dorms, which for me meant getting undressed, and dressed in the shower. But there's no where to do it other than right in the shower cubicle. And trying to balance on one foot whilst I pull my pants on, whilst trying not to get them wet seriously annoys me. But, other than that last little rant, top hostel!