I don't like them and I have absolute no use for a locking knife of any kind.
Its not the knives I dislike, but the total and careless knife handling attitude they breed. I've seen the aftermath of three serious life accidents that resulted in stitches for one, stitches and an operation to restore severed tendons and nerves in an other, and a totally amputated right index finger in the third case. In each case, the knife user was using a brand name locking knife and was confident in its locking ability. The knives were not gas station junk, but a ZT, a Buck 110, and a Benchmade in another.
All of the victims were Kool-Aid drinkers of the particular brand they were cut by, and in the aftermath were shocked and amazed that their wonder knife had failed. The knife industry is partly to blame, showing advertising where a blade of a folder is in a vise with barbell weights hanging from the handle to prove their lock wont fail. Or stabbed through a car door to prove its penetrating ability to young knife buyers with more money than sense. The knife industry has made a lot of money peddling fantasies that have very little to do with real life.
All my life I have used slip joint pocket knives. If the pocket knife wasn't enough tool, I got a tool that was. A sheath knife. What is called a fixed blade now even though its not broken. The only trust worthy knife is one that is not already broken by a designed hinge in the middle of it. A sheath knife with one solid tang running through the whole thing is not going to pack a surprise folding on you. The most you will get if you abuse it is a broken blade.
I dislike lock blades enough to consider the un-folding pocket knife, a small sheath knife that is pocket sized if I worry that much that I need to protect myself from a folding blade. I just find it funny that in this day and age of the office cubicle that people need a much more secure knife than our grandfathers has in an era where men worked more with their hands than today, in much more rural settings. They had lock blade knives as far back as the 1800's, but they never caught on with working folks like the common slip joint. If more knife was needed, then some sort of fixed blade was carried. When John Wilkes Booth was killed at Garrets barn in 1865, he had a folding dagger on him that had a locking blade.
Looking back on history, how many people did well in day to day life with friction folders? Not even a backspacing. I watched all this change take place form the late 1980's with the birth of the "tactical" knife as a response to the increasingly stagnant cutlery market. The need for something new so they could make money. Funny how some cowboy pushing a heard up from Texas with a cattle knife in his pocket, a sailor on a square rigger with a sheep foot clasp knife in his pocket, or a freight wagon driver with a Barlow knife didn't find the need for a lock. But they did find need of multiple blades.
Jeff Randall made a statement in an interview that 99% of the knife market is BS. I believe him. If I was hearing out for work, I'd rather have my old Buck stockman, or a Case Texas jack, or even an old Russell's Barlow in my pocket than any modern locking blade knife. It least I'd have multiblades blades to choose from. If I needed a knife that absolute wont fold on me, I'll put a sheath knife on my belt of in my pack.