Makes me happy to hear you're enjoying them!Have only been using it since Saturday - I broke it out to rock the Alliance rda - but as I am not able to build coils because of neuropathy - I had my youngest brother build me a couple of micro coils and I can say both the IPV4S and the Alliance are awesome - still figuring out all the ins and out of the IPV4S but seem well built and comfortable in my hand. Larger than the devices I have been using but not at all awkward.