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I have them! Not too bad but you've gotta keep the chrome ones clean, especially with road salt. They will rust in no time especially if you do not Polish them from time to time.
I found that some polishes work better than others..I have the best luck with Mothers polish that comes in the small can thats more of a paste. The liquidy, squirt bottle, type of stuff seems to not last long and make them rust pretty quick. All and all, for 250 (from summit), I think they were worth it.
It's also worth noting that most rust that I've encountered has only been after a huge snow storm with tons of road salt. All of the rust wasn't doing much and I could wipe it off with my thumb.