I've had 3 WH's, all users for me. One is an older carbon-fiber model w/ 3.25" 154CM DLC-ed blade, CF scales, liner lock. I carry it always while running, and it's super light (1.45 oz.) yet plenty strong & functional. The gold coating on the pivot screw has worn off over the years.
The other 2 are both 'attache' models, one w/ 3.25" blade and one w/ about 2" blade. They are laminated zdp (420J2 outer layer, I believe) DLC, CF scales, button lock.
I love the cutting power of the zdp blade, but have come to dislike the button lock. Although it provides solid lockup, my problem is that under hard use I tend to accidentally unlock the blade when some part of my hand contacts the button. This doesn't happen for me w/ liner locks. Not very safe to be cutting away at something and suddenly realize that the blade has come unlocked.
I have never used the form fitting leather case w/ clip--too worried about losing a $500 knife. I just drop in my pocket (an otherwise empty pocket--to avoid exessive scratching).
I'd love one of the Gen-tacs with beautiful wave-damascus zdp and clip, but I won't spring for it with that button lock. If WH would make a gen-tac w/ liner lock I wouldn't be typing away right now--I'd be buying a new WH. This partly is also just because I don't want to have to switch back & forth between liner and button lock due to 'muscle memory.'
The tiny WH w/ 2" blade is perfect as a 2nd 'sheeple' knife. I carry 2 knives often. One is a medium to large size frame lock (currently kershaw ti-zdp mini cyclone). The other is the tiny WH for use when the squeamish are present and I need to open a package or clip a newspaper story. The muscle memory isn't an issue for such uses.
I understand why WH went to the button lock, and it does have it's pluses. I just wish they would offer the liner lock as an option, especially on the Gen-Tacs.