I looked in for refueling (with gas), I can't tell you its price relative to other gas stations. The tanker refuels, the staff is adequate, moderately friendly, there was no queue (well, almost). They didn't fill up the excess tank. There is a bonus program (but it is so-so, imho). Inside there is a world cafeteria and related products, as well as 3 tables for sitting. I didn't look into the bathroom.
Good and clean refueling. The toilet is clean. The fuel quality is good. You can pay with a Mir card. There is a selection of goods, there is something to eat. The staff is friendly