Olga's home is very conveniently located, close to the metro, and yet the area is quiet and the home is usually quiet too. She keeps the home reasonably clean - you can't complain for the price.
However, I don't believe this was clear in the listing: Besides Olga and Valery in the basement, there is 1 renter on the main floor and on the second floor there are 6 people (including you) sharing 2 bathrooms and 1 kitchen. That's a lot of people!! This was an issue sometimes: when I had to wait for the bathroom, when co-renters did not respect my space in the fridge and put their own things on my shelf, when some of my food mysteriously went missing (co-renters ate it I guess), and when people were noisy talking on the phone or watching loud TV even around 11 pm. Most concerning to me was coming home sometimes, or walking by the front door after some people had left, and noticing that the front door was unlocked. While you can lock your bedroom door from the inside to be safe at night, you can't lock the bedroom door from the outside when you leave, so I was worried my possessions would be unsafe either from my co-renters or from strangers wandering into an unlocked house...
To their credit, Olga and Valery do try their best to be helpful and accommodating in dealing with any issues you bring up. Overall, the rental was good - a great price, good value for what you get. Olga and Valery are great and it's not their fault that some of their renters are inconsiderate/disrespectful but it's something to be aware of.