Pretty good no matter what you are playing.
Third time in history - Putt Putt Perfection (18 Holes in One)
TheSandTrap.com Top Picks
That's awesome! It looks to be on a par with a 900 series in bowling - at least as far as rarity.
I found myself giggling though at sentences like "... who turned professional in 1984 ..." ;) The idea of a professional mini golf league amuses me.
(This is still not as impressive as what Kim Jong Il was capable of, though) ;)