First impressions were that we were in a different apartment to that in the photos! There was no kitchen, and the layout of the apartment was just totally different. It wasn't a problem, per se, but left us a little concerned that we were in the right place. Secondly, we noticed immediately that the apartment smells of stale smoke; not sure there's much else that can be done about that, but it was unquestionably off-putting for us. Thirdly, it was extremely cold in the flat; we travelled during the middle of January, during a cold snap, so that's not to be unexpected, but more just something to consider when booking during this time (there is a heater, but it takes a little while for the room to warm up).
These issues aside, for what we paid, the room did the job. It's close to the station, easy to find, and it's useful to leave the suitcase in the café next door to the apartment. We found the bed very comfortable, and there were enough blankets to wrap up during the night.