This was quite a fun game to play through and I recommend playing it (though $9.99 seems a bit high). If your a fan of Heroes of might and magic, then you will likely enjoy disciples. The two have many similarities (resource management and city building) but enough differences (such as having small armies of 6) to make an enjoyable change of gameplay.
I played through the main campaign and greatly enjoyed it, however once the campaign is finished then you may as well lock it away and stick to the newer Disciples 2.