Just wondering, has anyone used or had any experiences (good or bad) on the Neutra-salt corrosion prevention system for marine engines?

I've in stalled the system on several boats. Seems like a good easy way to flush your motors, better than just flushing with fresh water I would imagine. I guess time will tell how effective it is combating rust and corrosion. Fresh water cooling is the most effective and you don't even have to bother flushing.

Same concept as the Salt-away/Star-brite hose attachment thingy, but it's permanently mounted and electrically "injected". I personally don't like the idea of still using salt water to flush the engine.
I'd bet all the salt-neutralizing chemicals are the same (Salt Away, Star-brite's product, Neutra-salt, etc). As long as you use fresh water and one of these, that's probably the best you can do short of closed cooling. And even if you go with a complete closed system, you still need to flush the heat exchanger regularly (every time?).