I stayed in the Mini-Musiker-Zimmer for two nights over a weekend on my first visit to Switzerland, and I must say that this is a great way to sample the Swiss culture for the first time! I had a great time listening to the Swiss music and talking with Cedric, one of the bar tenders at the Aelpli Bar. I thought I might be more aware of the music late at night. The music played until about midnight each night I was there but I did not find it hard to sleep even when I went to sleep early on my last night in Zurich. The location is ideal for walking around the downtown and central part of Zurich along the Limat and the Lake Zurich. The room is very small, with one bunk bed (two mattresses), as advertised. The bathroom and shower for guests are a bit oddly located because they are connected to another larger room that is used as an office; however, I did not have any trouble with this and did not mind it at all. All in all, this is a great place to book if you're in town visiting for a short amount of time and - at most - have only one other person with you (two people would be the maximum that could comfortably stay in the Mini-Musiker-Zimmer). I highly recommend!
cheers,
James