There are cheap knives and then there are cheap liner lock knives.
I avoid liner locks from high quality makers...I sure as heck don't want to risk thousands of $$$$ for tendon repair surgery with a cheap liner lock. IMO they perfected the liner lock when they flipped it around to the back side of the blade and made it the compression lock. One of the many reasons I love the Spyderco Paramilitary 2 is the compression lock.