It's not just about opening though. I chose Maxx Glide, and prefer unassisted to assisted where possible, because assisted knives are harder to close. Also, one of the 'problems' I've had with Gun Hammers is that they kick so hard that, for the uninitiated, they often kick right out of your hand. Which is cool, but dangerous if someone's borrowing your knife. The M390 one isn't quite as bad, but both of the others have taken numerous tumbles to the ground since they jump right out of people's hands. I've had to start warning people to hang on really tightly to the knives.