I am very interested in the Magma clone. While I know that the Infinite version is supposed to be the best quality, how do the ehpro/tobeco clones seem to hold up? Is the build quality bad? Should I just buy the infinite version of it for a few bucks more? Thanks for any feedback on this, I have found a few deals but I am not sure if it is worth the extra few bucks for the infinite version of it.