Experience is cumulative and losses cannot be replaced, so you not only are careful about risking your Marines in foolish actions, but become attached to them. The only problem I had was a bug which crashes the game near the end of the campaign. I haven't yet downloaded the patch that should fix it. As it is, I went through over 20 campaign battles without a single glitch before this. Nothing fancy, but they are attractive and do the job.
Character animation is smooth.
Terrain a little too structured, but it is based on a miniatures game, and the buildings are nicely rendered, as are the characters. Gunfire effects and explosions decent if not flashy. All in all no complaints. The best thing, and this is more of a problem in tactical games than many realize, is that, with the additional strategic map, and the ability to zoom in or out, it is very easy to keep track of where your troops are in relation to each other and the enemy. Again, solid, serviceable, but not mindblowing or anything.