The place is decent, but to change the cylinder to 27 liters, you need to go through a number of procedures that increase the stay time, go to the RSC, pay, then with a check to the checkpoint controller, and then only for the cylinder. Moreover, it is impossible to enter the territory, for pensioners or women it is quite a heavy burden.
On Google's recommendation, I came to fill up a 12-liter gas cylinder. I paid at the cashier, but it turned out that the cylinders were only for exchange, and mine and the valve could not be exchanged (they were not available) and could not be refilled. As a result, he went to the gas station, where he was refueled. The staff are polite and friendly, but they are out of work and don't know what to do with themselves.