Maries flat is absolutly perfect!
I was there with my boyfriend for a few days and the flat has everything what you need for a good stay. Besides the flat looks so great- everything fits together. It has an ideal size and is just 2 stations by tram to the main station and also 3-5 stations to the oldtown centre.
And Marie is a very very friendly hostess - she also made an own guide for her guests with interesting and important points.
According to this I can recommend her flat for everyone who want to have a nice and not really expensive stay in Prague!!!