Very quiet and comfortable. We didn't have anywhere to be early our first morning and ended up sleeping in until mid-morning. We never do that! Again, it was so comfortable, sleeping in was easy. The friends we were meeting were disappointed for us that we were not in Zurich city center, but I was not disappointed in the price for our one night stay. I think it was the only place I found for my family of three to sleep for one night for under 150 CHF.
If you are traveling to Jung Soo's place by train from the airport, and plan to go into Zurich center the next day, consider buying a day pass. This will save you some money, especially with a family. We arrived in the evening, and if we would have purchased a 24hr/day pass would have had our transportation ticket for the next day. It was a "duh" moment when we had to drop another 24 CHF to get on the train again to get into the city center.