I have a 310 (hull 160) with a 2 blade feathering Maxprop, 15 x 11 RH. I was lucky enough to buy this used from a friend that had it on his Catalina 320 and figured he wouldn't get his monies worth leaving it on his boat when he sold it. I had a 2 blade fixed before the feathering. I wrote 15 x 11 in my notes, but there is an adjustable pitch on this prop.
I find nothing but bonuses in it's performance. Increase in motoring speed, better reverse and less prop walk. I probably would not have bought it new because of price, but it has been one of my favorite upgrades. There is an increase in sailing speed, but I'm not sure what that is due to the ever changing conditions, but motoring is about a .5kts increase.
I'm sure most of the modern feathering props are about the same, performance wise, and there are many tests on-line that you can look up.
Cheers