Like most things PC gamers put up with like DRM, no support for non 360 controllers, and the lack of patches to fix very simple bugs. I only use GFWL when im forced to due to a game ive bought.
Other then that its a POS and just another facet of MS trying to force PC gamers into 360 gamers. Remember MS arnt intrested in PC gaming, its the non gaming aspects of the PC where they reign supreme so forcing all the PC gamers on to their console is a win-win for them.
Luckly since the PC is open ended, there are ways bypass some of the crap they try to force upon us