This game is a beautiful gem with some serious flaws. I should know it pretty well after about 600 hours of gameplay.

Flaws from the worst to the least:
PvP. It isn't well balanced, the turns are painful to wait through, and you never find matches anyway.
Moderate to difficult learning curve.
AI has major tactical faults, and it's still painful to wait through your opponents turn.
Time consuming. I spent more than 100 hours on each of my single player warbands, but at the time I am writing this I have not completed all of the campaigns.
Random number generators, usually have a bias. This one causes 1% chances to occur 25% of the time.
Looting wyrdstone to improve your faction reputations takes an investment beyond any reasonable effort.
Discovering the enchanting recipes is also random (many have no benefit).

The Value:
This emulates the feeling of table top games like warhammer, warmachines, and malifaux wonderfully.
You can make a list from your collection of mercenaries and kit them them in minutes. A full game should take less than an hour, and if both players act quickly can be over in less than 30 minutes.
Each of your models is highly customizable in both appearance and functionality.
There are persistent effects from inuries and mutations (chaos only). Often times this means you will have a completely unique warband.
The reserves allow you enough extra troops to be able to have a flexible fighting force. (You don't have to do the same thing every battle).
This game is challenging, and learning its intricacies is rewarding. More importantly information is attainable.