We had a wonderful time in Prague! The pick-up service that was suggested by Jaroslav is great and I would definitely recommend it, very convenient and the driver was friendly. When we decided on the last day that we would also like to get a ride back to the airport, Jaroslav arranged everything within a day and responded quickly. Communication in general was very easy and friendly.
Two things were inconvenient about the apartment: there was no shower curtain, which made showering quite difficult if you didn't want water all over the floor. Also the elevator only goes to the 4th floor, which means that you still have to walk three stairs to get to the apartment, so if you are walking with difficulty this can be a problem.
Other than that I can recommend the apartment, everything looks like in the pictures and especially the location is amazing: neighborhood is great with friendly people and it takes only 5 minutes to get to the city centre by metro (which is only a 200 m walk from the apartment).