TTI Exhaust Longevity

Has anyone had a TTI system for a while? If so, how's it holding up? I'm just wondering about the life or the system being that it's aluminized and not stainless pipe. It's probably not that big of a deal since my car will never see rain again and will only be driven occasionally, but just want to get some feedback. Also, how do you all like the sound of the DynoMax mufflers that provide?

Thanks