I've also carried my Flash II as my EDC for the last 4 years or so. I've never had it open accidently in my pocket. Any sort of resistance will stop the opening of the knife.. It's not an automatic knife, it's an assisted opening one. I don't think most people would understand the assisted open until they actually own and carry one. I had my reservations before picking one up. I have many knives, Benchmade, cold steel, gerber, sog, etc.
I normally would try to keep it simple, but feel the Flash II is reliable enough to carry everyday. Most people don't realize that if the assisted function "breaks" you can still operate the knife like any lockback. I see very little "risk" in it. Not only that, the Flash II is "fairly" inexpensive compared to the Benchmades and such, that I would not have a problem losing it or having it confiscated by a LEO that is uncertain about the law.