I have been familiar with Belarusbank since the 90s, when we had the American currency $, and there were practically no exchangers, once back then I turned here to find out what kind of money 100 Australian $ was, refused that it was only a meager penny, then the bank's payment cards appeared and since then Belarusbank has become permanent for me everything works well, the service is always on top, in general, everything is fine!
ATMs do not work well, they often do not accept currency in perfect condition. You wait in line for 40 minutes, then you don't take the money, the girls work well.
You need at least one cash register with cash operation. And the ATM does not issue very good currency, look carefully at each bill, there may be a speck and creases, and then they refuse to take them from the same bank. You noticed right away, you say you need to be replaced.
The ATM does not accept 100 rubles. Bills, keep in mind. I had to go change at the Central One. It is very pleasant inside the compartment, there is a place to charge your phone and wait comfortably, there is a children's area