We had such a great time at this place, and Katka is a great host. She was prompt with communication and seemed to know everything that we'd need to stay in Prague. She left a guidebook that she made of restaurants and places to go in Prague and also any important emergency numbers that we would hopefully not need! She also left two beers in the fridge because you know...when you go to Prague you have to drink beer. Unfortunately we didn't get to finish them because we would come home every day and just relax/sleep immediately, but we wanted to take them on the plane...
As for the location, it is so central. You actually can't take the public transport without feeling kind of silly because all the attractions are a 10-20 walk away. The castle is farther of course because it's across the river, but we still walked there when we went. However if you do need public transport, you are a five minute walk away from a metro station. There are also plenty of bars, restaurants, and shops around the area. The street itself was quiet since it goes off of a larger road. We liked that.
The apartment was spacious and has all the modern appliances. We really loved it and it was nice to come home after a long day of walking in the cold to a warm apartment. There was a TV but we didn't use it. Katka also had teabags in the apartment, which was nice to make every morning.
When we come back to Prague (hopefully in warmer weather), we would love to stay here again.