This game had me hooked right away, I even spent about $30 for extras the first week. However, within the next few days I hit a wall in pretty much all progression. I have to grind for materials to level up my heroes, and being destroyed in even the regular campaign levels. This has drained my enthusiasm for the game, and I seriously hesitate to spend anything more when my last few purchases have hardly helped me advance. I'm an experienced gamer, something is seriously wrong with the mechanics.