The angle of descent is 75 degrees. I have ridden it a few times. UNPARALLELED ejector air in the back seat, followed by a head-to-toe soaking. Bring a poncho! Easily the best "up turnaround drop" boat ride ever, when it is working, that is.
Knott's itself is definately worth a visit. (my homepark, sniff) There also happens to be one of the greatest coasters in the world there too!
-------------
"X" marks the spot in 2001!