Its main attraction are the duty free shops selling tax-free alcohol, caviar, cosmetics, clothes, simple souvenirs, and travel junk. It was however renovated in 2006, so nowadays it's much better than it used to be.
There's a very neat and nice post office opened 24 hours in Arrivals zone (2nd floor), where among other things you can browse the interent for 200R ($8) / hour, use a printer, and charge your mobile phone. There's also wi-fi in TGI Friday's restaurant (2nd floor, Arrivals).
There's a bar and a good grocery store in the Arrivals area, both opened 24 hours.
A few restaurants are scattered in the departures area (after the check-in counters), the only ones worth attention are Tajmahal restaurant (located next to Terminals 6-9, upstairs) and the Irish bar - the favourite among transit passengers.
If you end up waiting for your flight, it’s better to go to one of these two places (by the way, you can plug in your laptop there).
The departure and arrival area outside of the check-in area have a few 24-hour food and souvenirs shops, pharmacy, cafes (a meal for about $10, drink - $2-$5), bank and exchange offices.
The airport is located about 15 km to the north outside of Moscow, 5km to the right from Moscow - St Petersburg highway.
The new Terminal 3 was opened recently and it's much better than SVO2, but not all the flights arrive there, yet.