No problem with 4K (with 2m cable, at least), good workmanship.

I think the other reviewers so natural that they have problems with 4K, possibly other cable length maybe.
My 2m cable has finished definitely my frustrations. I have a LG 34UM95-P monitor on a DisplayPort Gigabyte boards with 3440 x 1440 resolution and had massive problems with interference, complete failure of the image, etc., and all this with the original cable that was at the monitor there.
By Clicktronic- cable problems since then have completely gone. The build quality is good, the cable well pliable, no unpleasant odor.
In my view, therefore, full marks.