I had a set of old HDMI cables that were plenty good for my 1080p TV, but since I upgraded to a 4K TV I didn't feel like I was getting the picture I deserved once I install these cables I instantly noticed a difference in the picture quality and the color saturation I rate them 5 stars because that's exactly what they are.
I purchased these as a compromise to the Belkin ones recommended for use with Apple 4K TV. The cables seem to be high quality and work as expected. I have yet to get any better picture between the Apple device and my TV…but I do not think it is the cables, it is more than likely one of the many settings you have to change on the TV or Apple device. I would recommend the Monoprice cables as a quality less expensive alternative.
I was having the occasional "handshake" problem with my mixed bag of HDMI cables I was using to connect my 4 pieces of Audio/Video equipment to my Home Theater receiver and the receiver to my 4K TV. I replaced all with these cables from Monoprice and the system is running great now with no stutters or problems.