We just stayed one night at Oxanas place and we really loved the location. The Wenceslas Square with all its Shopping options is just a 5 minutes walk and the train station about 15 min walking.
Next to the apartment is a vietnamese restaurant, which is absolutely worth trying.
The aparment itself is small, as expected, but that wasn't really an issue if you just stay one or two nights.
The terrace is a big plus, but the trash bins from the neighbouring houses stand just right next to it - which means it smells a bit and you wake up from the noise of somebody throwing his trash into the bins.
With just one window (the balcony door) the air smelled musty.
Our stay was alright but we expected a bit more.