We have a Max prop and have had no problems with it. Because of the flat blades the prop walk in reverse is a little stronger than most other props, takes a little getting used to. Annual maintenance is easy, get the grease kit from PYI. The grease runs about $20 a tube, however it will last a long time. I've had my prop apart 3 times and serviced it every years for 9 years and am just using up my first tube of grease. Do order up some extra set screws from McMaster Carr, they have a way disappearing between the time you remove it and the time to put back, especially problematic if the boat is stored on grass or gravel.
Folding and feathering props will improve boat speed by as much as a knot.
PYI Tech support is top notch. Follow their guidance on setting the pitch. They will need to know the boat model, the engine, the transmission and the transmission gear ratio. It is not difficult to reset the pitch if needed, just a bit messy.