I have been using this since day one so far so good

angle of the harnesses didn't seem that different than the other cars I have seen on their website and I can definitely understand why they would warn against it (as it's not tested, liability issues..etc)..
as I stated in my first post, "use it at your own risk" or don't even bother with aftermarket harnesses if you're happy with OEM seat belts..this post is intended for those who's considering these