First, the service. We had some difficult travel problems while staying in St Moritz, and our German is zero. The hotel staff helped us in every way they could and enabled us to get back on track. They also arranged a room change and gave us free local travel passes. We are very grateful for their assistance.
Second, the restaurant. We think this is one of the best eating options in lower St Moritz on a price/quality basis. And in upper St Moritz the price can be scary.
Finally, the rooms. They are high-tech, with some good features and some not so good. There is no Aircon and rooms may warm up at night. Our front room was a warm room, and the traffic noise was too loud for open windows. Rear rooms are cooler and quieter. All rooms are spacious and are well-equipped.
The location is not inspiring as the hotel is next to a gas station in a semi-commercial area (but on the plus side, the gas station includes a shop). But all in all, on a price- performance-service basis, San Jian is a good option in lower St Moritz.