The place was good, it's it near center of the historical town, you could reasonably walk to many tourist attraction. The Charles bridge is about 5 minutes, the Old Town Square is ~10-12, the neares metro and tram stop is about 4 minutes away. While the tourist attractions are near, the nearest supermarket is circa 3 metro stops away. There is a balcony too in the building.
It's a great choice for groups as you can fit 8 people at the table, there is a great communal place in the apartment, where you can find a TV and a couch to sit.
There are good restaurants nearby, the one next door has a direct pathway from the building.
There was a hairdryer mentioned in the ad, but there was none in the flat.