This is an old school turn based RPG game.
The storyline isnt going to knock your socks off but the gameplay will. There are many different tactics to win battles even within one class and there are 3 to choose from.
How you build your army often dictates your tactics and vice versa. The locations of items and spells are random so you wont always get the same items or spells available making it a very different game every time you play it.
The only downside to me is once you get deeply immersed and want to get the best score or go for a no loss playthrough then you do have to adopt an element of cheesyness like running past encounters to get access to better items and armies. But the game has already got you by the balls at that point. Enjoy.
For people who have Kings bounty I liked the improvements they made with this sequel. The classes are a lot more balanced out and the rage system improved.
Oh and crossworlds is essentially this game with a lot of extras so if you can afford that I would recommend getting that as well rather than think of buying it later.