I played a copy of the old turn-based games, and they were pretty fun: Wanzer customization, tactics, OMG DID I REALLY JUST MAKE THAT SHOT type of luck things, but that was years ago.
So then I hear about this mech gaming coming to the PC. With customizable parts! I've always wanted an Armored Core I could play on my PC, so I picked this up (knowing reviews were eh to awful) hoping I could still make a fun game out of putting the different parts together.
I was wrong.
The single player campaign was terrible. I got about two hours in before becoming absolutely bored of the Point A->B->C nature of the levels, and while in some games that works really well (Call of Duty 2), it just didn't feel right to me. So I still tried to stick it out, until I realized that their custom parts only really let you pick light, medium, or heavy builds and that was about it.
I uninstalled it the next day.
tl;dr: don't buy it if you want something fun.