The only real drawback is lack of mission variation. You spend a lot of time doing the same thing. It was still fun tho.
For the most part you start out with a basic base which you can quickly expand and upgrade. Sometimes the enemy will attack early on but most often there is plenty of time to build up an army to go out looking for trouble. So you methodically clear the map of enemy units and structures and then move on to the next battle, which is likely to be more of the same. This is disappointing after playing the first mission which is story driven and takes the fledgling fellowship through Moria.
There are a few more story driven missions but not enough to keep the game from eventually falling into the doll-drums of repetitive game play.
Other notes:It would be nice to have the option to pause the game and still be able to issue orders.
Graphics and voice acting are quite nice, unit selection varied and interesting.