This is the place you were looking for and one of the best hosts we've ever had! The apartment is very well located, just blocks from the astronomical clock and square. It's easily in reach of other transportation, however the location makes it convenient to walk to many places in the old town. Hana was in communication with us from the beginning, met us at the apartment, gave us lots of information about where things were located, had a map for us marked with places we might need, and answered questions throughout our stay. The apartment is on the 6th floor but there is an elevator is you have trouble with stairs. The building is very secure and felt safe at all times. The apartment was clean, spacious, and had everything we needed to enjoy our stay and even host dinner with our children. The bed was very comfortable as was the shower. And we were able to take advantage of the washer while we were there. There was never noise after about 11 pm and even before that is was minimal. If you are going to Prague, this is the place to stay. We will definitely be back when we return to Prague for another visit.