Nemesis on looks alone, but it is a bit fiddly. If you like tinkering with your gear, that's your huckleberry.
Why?
It has two adjustable pins for battery contacts: one is actuated by the button, the other lets you adjust how flush you want your atomizer to be on top. While awesome for flexibility, if you're still figuring out what atomizer works best, it's a bit frustrating at times when you get a misfire because you forgot to adjust the top pin.
I've also experienced the bottom pin working it's way upwards during the course of the day as i vape. Must be how i curl my pinky or ring finger to press the button, but as the pin maintains contact, the button works its way loose; i make it a habit to re-tighten the button after a session.
The last bit of fiddliness i don't care for is how many turns it takes to lock the button. If you don't have it dialed in (both pins adjusted so that the minimum button travel needed to fire is set), you can spend a long time spinning the lock ring before it's "safed".
Aside from those three observations, the nem is my favorite mod. The fit and finish are way beyond any other mod i own, and (IMHO) with a kayfun lite on top, it looks the business.
As an addendum, one more fiddly bit:
if the button travel isn't minimized/dialed-in, the button sticks to the delrin spacer internally forcing you to press directly in the center to fire. Drives me crazy sometimes, but story of my life - i love crazy the best.