This won't be a very long review, I don't have a Smart or 4K TV. I have a gaming PC, a Nintendo Switch, several TVs (borrowed) to test this cable on. As well as video editing software to actually do some comparisons between multiple videos using different HDMI cables that I had on standby. Simply put, this cable is as functional as I've always wanted. The picture is nice and clear, the sound is perfect and I have absolutely no input lag whether I'm using an HDMI capture card or not. I've played several sprite based games like Sonic Mania and Super Metroid and to be honest I have no complaints. It does the job I need and will be the main cable I use for my new consoles. I'll update this review every chance I get to test the rest of this cable's features. I definitely want to do this when I upgrade my monitor for my PC.