I have three flippers in my collection, so far, and really like all 3 of them for different reasons. I like my ZT0200 for it's heft, and how the blade flips out making that hard and loud snap as the blade locks up. The next flipper is also a ZT, the 0561, ( I actually HAD it but gifted it to my cousin, and will be picking one up next week) which has the KVT bearing's, allowing it to open with the softest of effort and even though I do not like this construction method at least Kershaw put a steel liner on the G-10 side. The final flipper, and perhaps my favorite, is my Hogue EX-02. This is designed after the Tank, and I really like the large, squaresh, rather flat, handles, with the .150" thick, spearpoint blade. Flipping it is a joy as the blade flys out, and this after I tightened the blade, and the liner snaps over to lock it up, and lock it solidly. Even closing is a joy as the liner snaps over to keep the blade "locked" until opened.
All three of these USA production made knives show the best of tight tolerances in their construction, and will not cost a kidney to purchase.