I have never met the Landlady, and we have only exchanged text messages. She instructed me well how to get in to the apartment and checked if I'm ok.
The Landlady has not provided me with a handover document, that is described in the contract and I regret I have not asked for.
On my departure I cleaned the apartment, however when I left, it appeared that cleaning is not meeting the Landlady expectations. She sent me an extra invoice, despite the fact, we have never discussed or agreed extra payments for cleaning services. I paid to close this discussion but it was disappointing experience and I took learning for future. I hope other people are more experienced so I wish them happy stay.