I've tried other brand straps on several cars I've owned, but have yet to find another brand of strap that rivals the Gatorback. The grooves are angled to completely eliminate any possible noise caused by the slightest change in the angle of the belt in relation to the pulleys on the engine. I had a slight creaking noise when cold starting my Pontiac G8 GT. It sounded like 2 or 3 birds in a gear if I ran it every day. I thought I would replace one or more tensioners or idlers, but Gatorback took care of it 100% right away! I am very happy with the product and one day when it eventually wears out I will have no hesitation in requesting that ONLY the Gatorback belt be used to replace it!