The best competive WWII shooter on the market
It's balance alone makes it a far better game than the Battlefield series. The lack of vehicles is a help rather than a hinderance as it levels the playing field and makes the results more dependant on the player than the equipment.
While it may share BF's capture and hold mechanic the smaller size of maps and lower player count, coupled with defined routes to and from the flags gets players working in teams more often than not, resulting in a highly enjoyable gaming experience.
Sure DoD:S may have had a dearth of maps to begin with, but every map that has been added since has been a welcome addition to the playlist. There is not a map that makes me go, "Oh God, please vote nextmap...", well with the exception of Flash on a 32 player server...
All in all DoD:S is one of the best competitive shooters on the market, that doesn't get anywhere near the attention it deserves.