The Cygnar Storm Tower is a rarity in Warmachine/Hordes, a light artillery piece that's worth taking. It's cheap, hits decently hard, catches troops efficiently with the bouncing lightning, and has a decent range. That said it's not for every army. You need to have a decent amount of electrically immune models on the table or you can easily find yourself zapping your own guys. But if you do then the Storm Tower can do some real work.