As GF says make sure you really understand QFE in metric system. Now Russia uses RVSM levels and FL in feet above the TL, metric QFE below.
Be more proactive than you would be in say Helsinki and expect late clearances. ILS Heights are quite low so configure and slow down a wee bit earlier.
If you are staying be careful at cashpoint machines for "overlookers" and wallet scammers. Enjoy.