I've have a couple original's and a couple Tobeco clones. Hard to tell the real from the fake. I liked them when I used them. Yes they have a lot of parts but you're not tearing it completely down to re-wick/re-coil, etc. So to me it was 'mute' about all the pieces. I enjoyed them when I used them. I just moved on to KFV5's and Primes. Disclaimer: I'm not a flavor chaser, been
vaping the same 2 flavors for 7 years now. If the atty doesn't leak and produces adequate vapor and is relatively easy to wick and coil, I'm a happy vaper.
The only real issue with them was for folks using them on a TC
mod. The spring in the 510 connection series of parts interfered with the TC board recognizing the slight resistence change of TC wires. A gold replacement spring was the solution, but as I remember even that wasn't foolproof for TC vapers. Again, not a problem for me 'cause I'm a Kanthal and watts kind of guy.