I used it on my 32 Roadster and it worked great! I know Steve used it on Penny and he's happy with it too. I plan on using it on the rockers and front of my Nova after it's painted.
I had a 3M bra on my Lexus IS350 for about 4-5 years, then it started to cloud a little bit where it was too visible so I took it off. I will say, I never got any rock chips, etc with it (obviously) and have had the bra off for just over a year and have MANY already. Id say if you get a quality kit (such as 3M), its worth it.
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'69 Camaro
416ci / T56 / 9"
Turbo in the works...