Buying from a dealer who will accept returns is good advice.
I have an SR2 aluminum and the disengagement is stiff. But I like the folder well-enough to consider ordering another in ti.
When I called a dealer to ask if he would check the disengagement before shipping, his answer was that, yeah, the Lion Steels are stiff, but customers have 30 days to return the product, no questions asked.
I'm not sure what the dealer meant by stiff. If it is anything like the Milspec that I tried, that's more than I would want to deal with. I liked the knife but my thumb didn't. I returned the folder, but a week later my thumb is still plenty sore at me.
Knife makers should understand that there's a limit on what our thumbs should be called upon to do!