I'm very glad that I decided to go with this rig. With that price tag my expectations where lower, but this product have a really high quality! The GB-U80 handle is very sturdy, lightweight, with a lot of mounting points, which makes it very versatile. you could use it as-is, or mount dive-light arms etc to it as well. Only thing is that there's a small plastic "hatch" on the yellow grips (covering some screws) that fell out during first use. But nothing more than estetics.
The dive-lights (LED-WP) where of much higher quality than expected as well. sturdy with a hard plastic shell, and doesn't feel like the cheap versions you can find on ebay (even with that price tag!). It has a proper hatch with o-ring seal and comes with usb-connector and a few different mounting accessories and filters.
I have been using it while scuba diving, mostly night dives. The light itself is wide and bright, and is perfect here in the Swedish muddy waters, where it covers midrange and shortrange. I have been using it with a GoPro 7 + macro lens, and it works perfect, filling the whole wide-angle GoPro footange with light.
It gets full 5 star rating, and that's becasue of the quality/price quota. Superb product!