Has anyone used this before?
I was reading the box and didn't see any information on what grade the clay bar is...
Anyone happen to know if it's safe or not?

I've never used that kit but I used Meguiars clay bar kit a couple of months ago and I can't see where too many others could be better? It was perfect and very easy to use. The car looked great. I posted pics of the car when I was done but I'm too lazy to find the post right now.

Thanks! I'll have to look for that, the store I went to only had the Mothers kit.

I have the Mothers Clay kit. The Clay is mild and should be foolproof as long as you follow the instructions, ie. use plenty of quick detailer (lube) and remould the clay every once in a while so the contaminants are away from the surface. Divide the bar up into 3 pieces and just work with one piece which is flattened into a size you are comfortable with.