I'm just a bit negative on this knife BECAUSE it is so solidly designed, actually. I've found that the very strong deployment spring.. coupled with the ergonomics of your thumb while using the "super secret" switch..makes the knife want to jump out of wet or slippery hands.
So, contrary to what one would think, I use the automatic feature in "unimportant" situations and the thumb button manual mode in situations where to drop the knife would be dangerous (i.e., more dangerous than just the foolish feeling I get when I drop any knife).
I have nothing but positive regard for the edge holding abilities, etc,. however.