The flat is lovely, in a pretty old-fashioned way. The bathroom door locks with a brass key, which is entertaining, but thankfully the amenities are all updated. The flat is equipped with a truly enormous bathtub, which is one of my favorite things!
This flat isn't wheelchair accessible - there's an elevator, but you still have to climb a flight of shallow stone stairs to get there.
Other than a squeaky floor and some loose doors (which are to be expected in an old flat) there isn't much wrong with Eva's place. It's within a 30 minute walk to everything we wanted to see, very close to the Charles Bridge and the Castle, right around the corner from a lovely Gelato shop. The restaurant on the corner has great burgers, but it's very pricey. The street outside isn't loud, and there is a very small Christmas Market in the old square around the corner.
The only downside, I would say, is that we unfortunately couldn't meet Eva. She kindly offered to have Petr pick us up from the train station, but he charged us 10 euros for the ride, whereas an Uber would have been 5. So aside from check-in, the stay was nice.