Don't hesitate to stay at Klaudio apartment. It has everything you need.
I traveled solo and felt very safe. The Wi-Fi signal is good, everything is brand new and clean, the apartment is in a quiet area and you need to walk 20 minutes to get to the old quote which is not long.
You can get to train by foot just in 10 minutes and you get get groceries in local stores or Conrad. Klaudio and his mum are very friendly and helped me with all the question. I recommend for sure!