This is a good, large frame-lock knife. It has great reverse-flick and flipper tab action, and has a smooth fall-shut action on the close. It's comfortable in my XL sized hand, and it cuts well. Unfortunately, my copy has a big, big flaw. Twosun put a form of thread-lock on the Pivot screw that just won't break free. I've tried heating up the pivot with a blow dryer and even putting it in very hot water but the pivot screw just won't budge for me. I rounded over a #8 Torx Wiha bit while working on it. Never done that before on a Twosun knife. It is very important to me to be able to maintenance all my folding knives so I have to take away 1 star on what otherwise would be a 5-star knife. If being able to maintenance your knife is important to you, beware that this one may be a huge challenge to take apart.