I only stayed one night, but in the future I'd be happy to stay there longer. CitySpot were very accommodating in allowing me to check in a couple of hours earlier. The room was really nice, as was the rest of the inside of the building. The only flaw being a dirty fridge, which was sorted out quickly. The bathroom was really nice, though future guests should be warned that the shower screen is very leaky, and after a brief shower, the entire bathroom floor has a lot of water on it. I had to use all my towels to soak it up, impractical if you're staying more than 1 night.
The street is a busy highway through Prague, it is very noisy. I had a room with windows on the back, so it didn't bother me. The people on reception were polite, friendly and spoke great English.