ive owned 3 different ones though my knife collecting. All have been d2 steel blades. 1st one had a pretty stiff opening, but the later 2 were really smooth. My 2nd one was used alot and when the lock got over to about 60-70% lockup, the roto lock would move around freely. Not a big problem but sometimes it would lock it open when trying to close it.
Other then that no other problems. They are one of the best in that price range imo. And there customer service, warrenty, and team are top notch. The best customer service i have experienced with any company along with ZT. They replaced mine with the loose rotolock for free, even after i told them that i bought it used on bladeforums and i wasnt the original owner. I also told them i had a od one (more limited) by mistake (i really had a regular olive one), and they had no problem with me keeping that one. Its a company i've always been really impressed with.
And you are getting a 'tactical' lionsteel at a fair price.