This is a very fun game. Pros: Well designed gameplay, unique enemy designs, easy to jump into and try different mech loadouts. Each level will favor certain weapons, but you aren't punished for experimenting.
Cons: May be dead online so BYO friends. I havent noticed any stuttering that people have reported in other reviews, but I havent been able to play online yet so maybe that's why. I've been playing with maxed settings with a GTX 970 with game installed to an SSD and everything runs super smooth so far. Even with all the mech loudout variety, eventually the replay value will drop without a stronger online community. Also GFWL (Games for Windows Live) is required to play. Doesnt matter to me much, but I know others will mind.
Tip: Buy this as a pack with other double fine games to take the sting out of buying this alone and getting stiffed on the dead online community.