I think there's way too much emphasis put on "genuine" and "fakes" when the real issue should be quality. You can read endless gripes about authentic Vivi Nova performance or lack thereof, as well as high praise for the various knockoffs. Think of all the dozens of ego-style batteries, or the legions of atomizers, carts, VV devices, etc. that all have their loyal adherents, even though each one is a copy of
something that came before.
As with any vaping device certain practices must be followed. Dark juices are going to drastically shorten a coil's lifespan, but the advantage of most clearos is that they dry burn pretty easily, and with the Vivi Novas cleaning is easier than ever. I can rehab mine in less than five minutes, including burn time. And it's a clone from free-cigs.com.
Let's face it - these are inherently cheap items, but for some reason our expectations of functionality are similar to those of Rolex owners. Just follow some basic usage and maintenance practices (outlined in about a billion places throughout this forum and elsewhere) and you should be vaping relatively stress-free.