Pros: The staff, both front desk, and in the bar, were very pleasant and helpful. The building is older, but in good condition. My four person mixed dorm room was clean and tidy, comfortable bunk. The bathroom was very clean.
Cons: No sheet on bed, just a comforter, which was just a bit creepy. Real downside was that it was ridiculously loud in the evening (on a Tuesday), even after midnight, loudest hostel I've ever stayed at.
A decent value in a good location in Denver. I might stay again if in a pinch.