A little easy for the experienced tactician.
I'm quite used to games like these, turn based and all. I have to say, it's a great game, and some levels can be challenging, however; I never wiped more than twice, one which was because I hadn't understood the basics of the defence skill, the other because I hadn't realized that you could run out of ammo. (Yes, the last one made me want to smash my head against my desk)
What is lacking, is the fact that I'm not forced to make a choice. In level 8, I've got all stats, which means that my every soldier can do anything they want to. Made the last level incredibly easy, btw.
Also, the defence function should be limited by the AP remaining when you use it; otherwise, it's amazingly OP. Especially if you're just waiting with a melee unit outside a spawner... Grind to level 8, and bam. Well, I didn't do this before the last level, however. Didn't really need to. All the creatures just died in one shot or so. :o
So yea, great but easy. :)