A few weeks ago a bought a EH Pro kfl clone from madvapes. I paid a little less than $70 for it. I cleaned it and set it up. Before I did this, I noticed that the air hole was super tiny compared to the air holes of my real ones. That concerned me. Once it was set up that draw was really tight..yep, the tiny air hole. I tried to take it apart but the screw that makes up the 510 connection just wouldn't unscrew and come out. I didn't try too hard because I was afraid of messing something up. Set up like it came from the store, it was pretty much unvapeable. So I took a drill to the air hole, chucking the bit up enough to not go too far inside. I was able to get the hole large enough so that it's now vapeable. It's still a bit tighter than my real ones but it's acceptable.
It's a beast to get apart.. that bottom ss section just doesn't want to unscrew from the base. I can get it apart but it's not easy. Fortunately, I can easily rewick it with that section on so it's not that big a deal. I managed to get it off this morning but had to use some force to get it screwed back on.
All in all, with it's tight threads and the modded air hole, it vapes and preforms like my real ones and I do (now) like it. But if this was someone's first kfl and they didn't know how what the real one was like.. it might not go over too well. I read over and over about how china clones are just as good as the real devices and maybe that's true in some instances. In my experience it hasn't been (other than the RSST). I read over and over about how this or that clone works well if it's modded in some way or another.
I can't really say that I wish I had spent a little more and just gotten another real kfl because if I had, I wouldn't have had the experience of seeing the eh pro model and seeing the differences and what it took to get it to work for me. I guess it was worth $30 having the take 10 or so minutes to drill it out. I don't know if I'll buy another kfl.. I've got enough but if I do, I don't think I'll buy another clone. I'm not against clones but from what I've experienced and read, it's a crap shoot.. you might get a good one..you might not.