I have not installed them yet but they look good in my garage. Frames are very thick with a 5mm black plastic as a thermal break. The aluminum profile is very advanced. When I measured two diagonal for 2.1x2.4m sliding doors, I was impressed. They were exactly the same, perfect right angles.
They don't have reveals, so a certain care should be taken when unloading large frames. Side and top/bottom frames are screwed together in the corners and large frames are not completely rigid as a result. Attaching reveals should solve this problem.