This is definitely the cute Old Town apartment you're looking for. It is clean, has two big rooms and big windows overlooking a beautiful cobble stone street, which is quiet most of the night and you won't hear trains from the main station two minutes away, but you'll hear people walking through in the mornings. Everything you need is in walking distance and Zsofia is happy to help with everything! Will definitely come back, when I visit Prague next time! :)