I'm really enjoying the combat system; it's a nice blend of action and strategy that I've never experienced before. I also like that the game gives each unit a voice, a unique look, and some flavour text that gives them some personality.
It would be cool if you could unlock side-stories involving characters you use frequently, instead of just more flavour text, but I've just finished episode 5, so I don't know if it eventually happens.
There are a few issues I have with the gameplay, though.
For one thing, I hate how you can't adjust your vertical view when you're in target mode with your grenade; when I want to take out enemies below me, I'd like to be able to see where the grenade will land. The grenade throwing distance bothers me as well, but I assume that's more because they want to discourage its overuse. :lol
The aiming system also causes me problems when I'm trying to shoot around corners with a non-sniper; the camera is centred around units when I move, so I think that I can position them about a third behind a wall to reduce counterfire exposure, but when I switch to target mode, the camera moves to the right of the unit and I can no longer see around that corner. A similar problem happens when I use the tank; I've wasted a few turns hitting trees that I didn't expect to be in the line of fire.
To be fair, I don't know if the game offers a first-person targetting mode other than snipers, so I will tip my hat to anyone who explains to me how to toggle it.