We had a lovely stay at Olga's place. The flat was clean and had everything we needed - even adapters for forgetful travellers like us :) The location is awesome, we could walk everywhere and get to the main attractions and to the airport shuttle bus stop within 15 min.
The self-check-in and check-out process was really simple and worked well for us as we had to check in in the middle of the night and check out very early in the morning. The instructions were very detailed and clear.
Overall, we would definitely recommend this flat and would love to stay there again someday.