I agree with you tonyorion that the ego looks nice, but doesn't last long. The ego was my first e-cig purchase back in October of 2010 and I had nothing but trouble with it. I could not get the batts to charge and was sent both replacement batts and chargers but the problem persisted. So after only two months vaping with the ego, I purchased the prodigy v3.1 and threw the ego into a drawer to collect dust. Never again will I use an e-cig that is not a battery mod. They (ego's) are a hassle to charge and unreliable IMO.
Now, if they were to design an ego that used separate batts from the housing unit and had a cut off switch, I would be one of the first to try it because I love the design of the ego. I do however need more than looks in my PV and rate performance much higher up than cosmetics.
Now to all you out there who love your ego's, please understand that I am in no way attempting to defame the ego or your choice. This was just my own experience and one that I have no desire to repeat.
In all fairness, I should point out that I did weeks of research before deciding on purchasing the ego. I found so many good reviews about it and believed I was getting a quality product. I'm sure that there are many people who have had very good results from there ego's, I'm just not one of them. It's quite possible that there was a problem with a batch of batts or chargers, but what is the chance that I would have the same problem with 4 batts, 3 usb chargers, and two wall chargers, shipped at different times? That was enough to turn me away from any PV that did not have separate batts from the main unit.