We haven't met Nikolai in person but he was always available via text message. His wife welcomed us in the apartment and was super nice and uncomplicated. She put a lot of Fiji water in the fridge which was highly appreciated.
The neighborhood was nice and we felt safe the whole time.
For us it wasn't clear that there was no cable TV / Netflix etc. There is a TV in the apartment but you can only watch DVDs.
All in all we had a nice stay in Nikolais apartment. That there was a washing machine available was also a huge plus!