I've been using my ego-c with type A tanks for a few weeks now. In general I like them a lot. Their flavor could be better but they don't leak and produce a good amount of vapor. I hear that the type B tanks hold 2ml as opposed to the 1ml that the A tanks hold. In addition, they seem to require that you use a different atomizer.

I'd love to be able to hold another ml of liquid in the tank but I don't know if they will work as well as the type A tanks. Anyone have any experience with them?