Pros: Location! You are a block away from the riverfront and no more than a quarter mile from the old town square and Charles Bridge. The train station is also within walking distance, as well as a large Tesco across the river. The wifi was fast, the TV is modern, and the unit is large. Andrea was quick to respond, and her parents are sweet and funny.
Cons: The unit has no AC, and it's very warm during the heat of the summer. There's a bar a half a block away that caused us to hear music and drunken shouting until 5AM (and then building construction across the street started promptly at 7AM). The unit is minimally furnished (don't expect a lot of kitchen equipment/condiments, extra bedding or towels, etc.).
I would stay again, but only for the location.