I have four full seasons on my Hi-Tek system and have had no problems at all. Sacrificial anodes are working as they should, and there are zero sign of rust. As I've stated in past posts I did not use the made in China supplied gaskets that came with the manifolds instead opting for Mercruiser gaskets and have experienced no exhaust leaks or cracks. In addition I used all stainless hardware including lock washers on the original install with none coming loose. I expect to get many more seasons out of them and have yet to see a downside to the H-Tek system (Plus there's the cool factor when the hatch is open).