I was on the verge of replacing my iMac (2019) because of problems. After using MacPaw, it is now running perfectly. I had to call once for a reinstallation and customer serve was great. It is my favorite product and a wonderful program.
I have a 2012 iMac, and I run CleanMyMac once a week. It has kept my ancient iMac running well enough to do basic tasks. I have been very pleased with the product.