Not only is the reception not open on Saturdays/Sundays (when we arrived), but nobody will answer the mobile phone number on the door. We saw at least 3 other groups, in addition to us, standing outside the hotel completely baffled and unable to get in. We left a phone number but no one called us back.
Eventually, on Monday, we looked in to cancel the room (after fortunately finding somewhere else to stay in a hurry) and they were really quite rude, blaming us for them not answering the phone. Oh, and charged us a day's rate despite us being unable to get into their hotel for "cancellation". They explained not answering the phone as being "because we were in Switzerland on Saturday".
We looked at the room (before returning to our lovely warm alternative with friendly proprietor on-hand). Cold, stark, very clean, noisy, new, next to the railway line, about sums it up.