The apartment: Very clean and spacious apartment that has plenty of amenities for you. Some of them are TV, Wifi, iron, clothes washer (no dryer), big shower and bathroom, stove, frig/freezer, basic dishes and cutlery, HVAC, extra adaptors for US to European outlets, big closet (in one room only) small dining table to eat or set up a laptop, big sofa bed, coat rack, separate luggage room, guide books, etc. It is on the second floor, so be prepared to use the spiral staircase to get to the apartment since there is no elevator.
The location: It is centrally located and near Wenceslas Square. This square around the corner stays pretty busy with locals and tourists. It's got a lot places to eat, shop, and visit. The actual street the apartment is on, Jindrisska, is bustling with people. On this street you'll have great access to a number of good restaurants that are very reasonably priced. There are plenty of little markets, liquor stores, and money exchange location near the apartment. In fact, the money exchange store right outside the apartment entrance stays very busy and is very convenient. It's one of the good ones because they exchange at the correct and current rate, unlike some of the other ones that charge huge commissions. You will also be within a very short walk to one of the main tram stops where you can pick up a number of trams, depending on where you are headed. Even closer is the underground train station. So you've got everything you need within a short walk.
Communication: Sarka is a great communicator via text. She offered her driver to pick us up from the airport and we thought is was reasonably priced. The driver gave us the keys to the apartment and explained what to do upon check out. It was all very simple - no complications at all.
Noise level: Since the apartment is on a busy street you will hear the faint sounds of the multiple trams going by but they are pretty quite. The sirens from the police or emergency response vehicles was pretty regular but it did not bother us at all during the night while sleeping. Overall, the second floor is very quite. In fact, other than the cleaning lady on our last morning, I didn't run in to any other person on the same floor. It's very private and very secure.
The only thing that did not work for me personally were the beds. My back couldn't take them. My wife didn't have any problems. So I improvised and slept on the quilt that I doubled up and that provided some extra cushioning.
We would stay here again if we were to visit Prague in the future. Sarka is a great host and it's a great apartment with a great location. Everything went so smoothly and our experience was a good one!