I have a v1.1 Expromizer that I bought directly from Exvape in Germany. Today I received the 510 pin fix from them. Originally, they said it was to be a new design heavier spring, but instead they sent an updated positive pin which is working great.
The more I use the Expromizer the more I'm falling in love with it. The vapor and flavor is outstanding, and perhaps the best out of any atomizer I own, including my kayfun clones, which I'm rather fond of.
I've mentioned previously that the build quality is not that great. The threading is really sub-par, especially in the chimney section of mine, but it's useable. It also arrived with many fine surface scratches on it, most of which polished out with some 0000 steel wool. It looks pretty nice at this point.
The quality of the vape is what redeems it, and my most favorite KFL clone is slowly taking a back seat to the Expromizer.
I've had no issues with it leaking with the exception of laying it on it's side when the liquid level is low. Seems to be prone to this because of the large air space it has in the tank by it's design. The only reason I know this is because I fell asleep with it in my lap and a small amount leaked out the air hole. I'm not in the habit of laying my mods on their side for extended periods of time, so it was only an issue the once. Kayfuns can be prone to the same type of leak on their sides with low liquid level.