I have one on my Aquapod 12, and powered thru a Maxi-jet 900 (replaced stock pump). The only issue I had, was the gears gummed up with slime after the first 2 days and quit turning. Took it apart and cleaned it, and it has been qorking like a champ for the last 3 weeks.
I have not had any problem with it shooting water above the water line at the top of its rotation, but you will need to watch the quarter inch or so surge and not have your you water level so high that you overflow.