I definitely recommend you staying in Platzhirsche! First of all, the location is great. You can walk to everywhere and visit the entire city on foot. It is right in the center. I haven't used any public transportation. When it comes to the room and the service, I can say that I could not have asked for better. The room was spotless and very well organized. You have the shower inside the room and a washbasin inside. However, you have to share the toilet with the other people on the floor. (4 rooms including mine) Nonetheless, the toilet was very clean all the time.
People were amazing. They were really helpful. I asked their help on what to do where to go etc. They didn't even leave one question unanswered. They were very friendly and eager to help you have a wonderful vacation/stay in Zurich. Due to cold, I got sick and they also helped me with some warm drinks. Choosing Platzhirsch is the best choice if you are looking for a clean, nice located room and a warm welcome.