Heya Rolf,
I don't have one, and it's because my local hardware store had one for me to handle.
They can lock, but you have to pull this little allen wrench out of the handle and stick it through a hole to make a blade stop. I could see that allen wrench parting company with the knife pretty quick.
The case also had the Drifter in it, which is what I opted for. It had a lock, a longer blade, had G10 instead of Nylon for scales, and it was cheaper.
I suppose if you were in a place that required a knife to have a short blade and no lock, you might pick this knife. But I wouldn't... I'd pack a better built traditional blade.
Go get that Sting 3B from CRKT instead.