Let me focus on things the others didn't already mention...

There are enough adapters to plug in your continental Europe electrical equipment, so you don't have to bring your own.

A transfer from the airport has been arranged. I have been picked up at the airport and have been brought straight to the apartment. The taxi driver lady was very kind, gave me a few tips, opened the front door of the house and gave me the keys. Well just one key, the front door key... a little mistake happened and the key for the apartment was missing. I arrived late and had trouble to get anyone on the phone. It took few calls with a caring contact person at the taxi company, messages over Airbnb, sms and unanswered phone calls. Finally, after 1.5 hours I got a call from Veronika, being very sorry and we managed to deal with it. We are all humans and something like that can happen. So just a general thing to keep in mind: check if you have at least two keys. One for the front door and one for the apartment. ;)

My person of contact, Veronika was very kind and caring.