I regularly use Sberbit for depositing and withdrawing bitcoins to a fee-free exchange. Since the trading platform doesn't support the usual payment systems, I have to resort to exchangers. I found Sberbit through several aggregators that track exchange rates, and it turned out to be the first one, offering the most favorable rate at that time for exchanging Yandex Money for bitcoins. The commission hardly affected the market price of the coin, and I bought it almost at face value. Later, I started cashing out directly to Sberbank. Although the rate isn't the best right now, I'm used to exchanging here and received a discount. I trust this exchanger; I've never had any problems with transfers, even when I urgently needed to make a deposit and complete a deal.