I would strongly recommend you receive some assurances about the check in procedure. I had informed the host when I would I arrive well in advance. I arrived on time and then had to wait for an hour outside the apartment before someone showed up with the key. After they arrived they did not know how to access the car park or even what the unit number was. The host knew this was a business trip and we missed two scheduled meetings as a result of this delay. It was the worst check in I experienced with Airbnb.
However, having said the above, after the check-in things were very good. The apartment in beautiful, the views are excellent, the cleanliness was top notch. and the location is perfect.
The check out procedure went very well. The host allowed us to use the car part 30 min past check out and there was someone there to collect the key as we left.