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.
Double-check every paper you receive here, reread it carefully before signing. They do not apologize for their mistakes. In general, the building is modern, and the workers are from the USSR. Advice to the director, work with the staff, teach politeness. And send them to advanced training courses.