I have had an Autostream on my boat for more than 10 years---including a 2 year cruise
. No problems whatsoever. Picked up a 3/4" polypro line off Florida
that ripped out my cutless bearing and sheared my coupling bolts, but no damage to the prop. Not so lucky was a couple I met in Panama
who had problems with their Maxprop after picking up a similar piece of flotsam. Always had great support from Martec on initial installation
(very simple) and when I repowered 7 years later. The prop is easy to service
and lubricate. I would not have a prop that is not externally and easily adjustable in foward and reverse. The zinc usage is going to vary depending on the electricity in the water
you are moored in. When I bought mine it was a lot less than Maxprop, but that would not be the reason I would prefer it.
Someone on this thread must have the technical background on this, but I think I have read that curved blades do not have any advantage at the normal level of usage in this kind of application--maybe that was in Gerr's book. I have never had trouble getting the engine
output to be maximized to either if the engines I have had.