How is this product? What is the best thing to apply it with? Any complaints?

I don't think it's that great. By hand or orbital buffer would be best, foam or terry cloth.

It's a hit and miss kind of thing I've used it on my 02 Grand Prix and my 89 Lesabre results are excellent. The bottle says you can apply in the sun I tried .....don't do it it's a pain in the ass to rub in.