I have not had the opportunity to try the ego yet, it's on the short list. I started with a 510 and honestly got a blue starter kit at wallgreens yesterday and I think for what it is and it's size it's fine. The battery has been a bit temperamental but, is a lot better after cleaning the connection on the battery. NO, the battery doesn't last a long time it's only about 90 mah (or so I've read). That's not gonna fire that cartomizer long. While I understand this is not the ego (from what I've read) it does however work and after refilling my first cart with e juice I'm getting vapor almost equivalent to the 510 which rocks in my opinion (way more than I ever got off analog). The blu is about just a little more than I got off the analog. I'm analog free just a few days shy of a month here, and been lurking for quite a while. Great forum and I keep reading and learning more and more and more. Thanks,Deach