I used the GT Omega Prime for almost a year and had zero problems with it. As it's Aluminium profile it was incredibly adaptable and when paired with the GT Omega seats it was super comfortable.
My only gripe with it was that some of the attention to detail parts were not top notch, like the endcaps and exposed corner brackets. This may have been rectified in the last year though.
I believe the issues with the end caps, have been rectified, the ones that came with the prime, were a little suspect, however the ones that came with my triple mount are fine