I started out with a SmokStik & it got me off cigarettes; moved to an ego & liked it better and then I bought my first GLV. I cannot swear that it will not be replaced by something more advanced, but I cannot imagine it at this point. 3.7 is my speed, and I love how compact my GLV is with an atty. I have a GLV 5v, but do not use it, but I use the heck of all of my 3.7v's. I have ax XL, and have tought about a Kick, but I just seem to be fine at 3.7. I just don't see me wanting anything except a new color GLV!!!