Yeah, I tried several brands of clay and Clay Magic was the best - IMHO of course, but, since getting a Speedy Clay Towel and Nano Sponge thing - I will NEVER buy another clay bar once the ones I have are gone. Why? Well, when it's on the cool to down right cold outside - clay gets hard and doesn't knead well, doesn't work well and can be a time waster if you're spending time warming it up between panels. Second, kneading - again, not so bad if the temps are up, but still, if you ave any arthritus in your hands, it can be a pain later. Third, speed, I went through a few cars last year that had a nice layer of overspray on them and after trying my trusty clay on one side of a hood, then the clay towel on the other - I balled up the clay and threw it as far as I could toward the swamp behind my house. I could rant on, but if you haven't got the point yet, then quit reading and go to another post.