I just picked one up today at the gun show. This knife is amazing. My finger is starting to hurt from flipping it nonstop.
I've been thinking about ordering one of those, or maybe the 0561. I've had a ZT 0301for about 5 months now, and it's been great. I was a lifelong Benchmade and Emerson guy but I'm really liking the Zero Tolerance frame lock. I won't spend the money for a "real" Hinderer, but the ZT version looks great.
0561 here and this thing ROCKS! I'm loving it.
I, too, had a finger start to hurt from over-flipping. Try alternating flipping and flicking with your thumb

I cant wait to see what scales they come out with. I really want a carbon fiber scale.
I got mine today too just about 30min ago my finger doesn't hurt yet
EDIT it's 11:45 and my finger hurts