Entertaining and easy, pick up and play action shooter
It's pretty short and easy because of the previously mentioned spawning, but it is fun while it lasts and is worth replaying thru again a few more times.
The "action on demand" thing doesn't really add any strategic elements to the game. I tend to run and gun thru the levels until I get to a point where there's a big-assed tank in my way, then I call for my own vehicle to be dropped on my position and use that to take out the tank then carry on my merry way.
You can also use the AOD to replace any of your team-mates who die on the battlefield at any given time for a very small price.
It's worth mentioning that the storyline is pretty engrossing and easy to follow too.
Can't comment on the multi-player cos I've not got a Gold Membership.