Try not to. I flew SU many times, all on J or F class. There's usually no entertainment even in F class, and atmosphere is generally deplorable with scary PX coming in from the back to steal your pillows and blankets. Other problems encountered included dripping roofs, closed toilets, and flies onboard. Service is schizophrenic depending on luck (in general the men are more helpful than the females), and there were times they ran out of meats, and all I got was stale boiled fish for dinners. Ground service is even worse, good luck trying to amend the departure dates even for F class passengers, and from what I heard, the Russian government has serious problems with the management of Aeroflot, so not only do they not support the national carrier, they do whatever they can to make lives hard for anyone connected with the airline. Better pay more, take any other airline.