After i put it TO the test on my automotive vehicle I am thoroughly impressed by the Gates 39190 Timing Belt Tensioner. It has exceeded my expectations with its smooth operation and long-lasting durability .The tensioner was easy to install, and I have not had any issues with it since. The pros include its reliability and longevity, and the only con would be its slight increase in cost compared to other options. Overall, this product is a great investment for anyone looking for a dependable and high-quality automotive tensioner..