I will start with the positive things. The apartment was nice and modern, as in the pictures. The building was also good and strategically located. It was close to the centre but not in a too busy area, we could sleep well with the windows open and were not disturbed by the noise. The check-in/check-out was smooth and easy. We had all the necessary supplies in the apartment. I think organizational things worked very well.
And now about things to improve... The apartment was relatively clean but whether you can call it actually clean depends on your standards. To my standards, it was not properly cleaned before our arrival. Some of the dishes and kitchen supplies were dirty, probably fastly washed by previous guests. There was dust in the places you do not immediately check like on lamps, power outlets and such "hidden" places. No problem for us, but for a person with asthma it could be. The drain shower pipe should be also cleaned better, the water was not going away from the first day of our arrival. Also, having all the necessary supplies in the kitchen, it was a pity to see that the spices were very old and dry. Maybe it was still possible to use them for cooking but they had an uninviting appearance and mostly no smell. Poor plants in the flower pots were dead long ago and it looks like nobody was watering them. All these minor things brought a general feeling that nobody really cares about the house, nobody "loves" it. Finally, there was major construction work going on just in front of the house, meaning that during the day we could not keep the balcony windows open because of noise and dust. And, of course, because of this the view out of the balcony was not as pretty as we expected. It was not a big deal but it would be nice if somebody have let us know in advance that such construction work is planned during our period of stay.