You read wildly different things about those controllers on Amazon reviews. I wanted to get something like that because my current setup leaves me basically controller-less for retro game emulation on my PC unless I want to use like joy2key or something. But using a 360 controller is far from ideal anyway, so I'd prefer something like this. I'm just not sure any of the emulators will recognize it.
Either way, these do look awesome. I'd really like to get something like this at some point.