This is SUCH a good base for exploring Prague. Really close to the nearest metro (green line) and so ideal for getting to Old Town Square, Wencelas Square and Prague Castle, for example, as the metros nearest these sites are also on the green line.
There are two great bakeries within a 30 second to one minute walk from the flat too. Great for breakfast! The farmers market on Saturday morning/afternoon was also lovely. We got ice cream, cheese and meat from there. There are also quite a few good pubs and restaurants nearby for dinner if you prefer something more quiet and local.
The apartment itself is very comfortable with rustic charm. The high ceilings made it lovely and cool during the hot days which was a relief to come back to after a day of exploring, and the shower seems to be new and is powerful with reliable hot water.