I stayed for one night in a single room as I had a friend's wedding that day.
The staff at reception were extremely friendly and helpful. I checked in with no problems and left my things in my room. The room, although rather small, was very suitable. It had a sink (great for some water when I got back late at night), mirror and a very comfortable bed. I slept with no problems.
The breakfast was fine, and included, which was even better as I don't know Salisbury very well and was extremely hungry in the morning!
Other people have stated the the outward apparel of the hostel was not that nice, but I completely disagree. I saw no faults. It was all very welcoming.
Overall experience was very good. The staff were friendly. The accommodation was clean. I have stayed at two YHAs previously, one was perfect and the other was dire (neither are in the UK). If I needed to, I would definitely stay here again.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC