I am buying my first e-cig and chose the Ego. Cignot has a deal going on a complete set of two. I was wondering if anyone could give me some advice on what else I should consider purchasing? I don't want to get this long-awaited item and find that I can't use it while waiting for backup supplies! I would really appreciate any advice! I am most interested in using the empty 510 cartridges and buying juice for them. Any suggestions on this, too? Thanks!