I fully recommend you to stay here because of it ideal placement. You can get all most famous Prague sightseeing in a walk. I recommend everybody to stay in the third room, because windows of other will be not in the garden. The street is not overloaded by traffic, but it will be more comfortable to sleep with windows looking to the garden.
For beer fans: the next door on the street is a craft beer bar. A lot of local Czech craft beer on tap and other craft beer from other countries!