I swapped to the Gatorback belts about 2.5 years ago. I replaced my water pump a year ago and did not replace the belts because they still looked brand new. Then fast forward to May of this year. My AC compressor went out. The compressor had the all too common slugging issue and was locking up, so much in fact that it broke the AC belt tensioner, but the Gatorback belt was fine. I tried replacing the tensioner thinking that was my only issue. But I ended up destroying 2 more belt tensioners before I realized it was actually the compressor. Breaking two more tensioner still didn't faze the belt one bit. So even with a brand new compressor and belt tensioner, I have a 2 and a half year old belt on it. Lol! But even still, the belts still look and perform like new. Worth every penny IMO.