This game is well worth the 10$ regular price, but don't expect deep complex gameplay. It's funny, in a sort of juvenile way, but it knows to stick it in it's own craw sometimes and got a laugh or two out of me anyway.
You won't spend hours and hours playing this -- and the game would be well served by a skirmish/random map mode, maybe a wider multiplayer mode, bringing it into line with games like Age of Wonders or Heroes of Might and Magic. Then again, don't take that to mean this game is like that -- it's much, much simpler, and significantly more deterministic.
I spent 8 hours on the campaign, only a few foolish losses which frustratingly had me re-do the whole mission, I would say my experience is average and you can expect 8-10 depending on how strategically you think.
All in all, I await the forthcoming chapter 2, however, it better be ♥♥♥♥ing cheap, I don't care to be nickel-and-dimed every time I want new content. I'd pay a dollar or two, but preferably they'd be free, maybe with alternate stories costing a few dollars.
Overall, weak accept on merits, but beware the DLC disease.