Great game, but some of its flaws - particularly an unbalanced endgame - make you long for Jagged Alliance.
Old fans of Jagged Alliance and the X-Com series should feel right at home with this game, as the gameplay feels like an updated version of these games. With some distinctive improvements, though: First of all, the graphics are much better with more detailed worlds and characters. Also, you'll find a (more) destructible objects: Shoot through wooden doors, bushes, etc. Also, the game awards you for sticking to a single weapon as opposed to constantly swapping between five different guns - a nice change that needs some tweaking, though.
Another nice addition is the Diablo-inspired skill-tree which allows you to distribute experience points on improving your characters. This helps give the game a role-playing feel, although the characters are colourless and you never have the same affection for them as in - sorry about repeating myself - Jagged Alliance.
The early part of the game is challenging without being impossible. Rush blindly, and you'll get punished, even against weaker enemies. However, the balancing goes down the drain when the Panzerkleins start showing up. Suddenly, you'll become a practically indestructible walking tank that only other panzerkleins can hurt. While at first it's fun trying to lay traps to defeat the enemy, it slowly gets annoying, and human opponents are no longer a threat.
All in all, the game is a fresh breeze from the past, but you may end up enjoying old memories from playing JA2 rather than enjoying the game itself. Personally, I kept thinking "Since the game is moddable, could I turn this into Jagged Alliance 3?"