I have had an Ultimate propel for over a year now. With the old style prop, and nothing to stop cavitation, I questioned my purchase. However after I upgraded the prop to the ez cruze, and made a number of other home grown mods that took many hours, I finally got it all to work properly and less risk of failure. After all that I have grown to really like it for fishing because reverse dose come in handy and there are things I like about the boat in self.
However if I knew then what I know now, before I ever had any foot powered boat, and could only have one, I would have went with only a Hobie. Biggest reasons are that Hobies are by far better suited for sailing. Sit on tops are far safer for winter fishing in event of capsize because there is no way to recover if it fills with water over your head. The propel will only accommodate a minimum of a medium sized person because the seat will only move so close to the fixed peddles and all parts for a mirage drive are easy to get.
In the year after getting the propel, I found a good deals on an outback, and from there, ended up with an oasis and an AI. Now I'm Jonesing for a TI. I need professional help!