This place is small, but size doesn't matter when it comes to good coffee. The staff is mostly friendly, as friendly as Swiss staff can get. They also serve a big variety of sandwiches which are all freshly made. They have their own roast house and the coffee they make is so good. The prices are quite high, but normal for Switzerland.
The atmosphere, the coffee, the sandwiches, the staff, the nice smell of coffee in the whole place, all recent Swiss newspapers and all in all a great experience. But go there with a big wallet because you will leave quite some cash there.
The place is not hidden but not where Foursquare says it is. It's directly behind the cigar store on the Zytglogge place.
Su: 10:00-23:30
Mon-Sa: 07:00-00:30