Here's my progression.
RN4081 - looks like a cig! Comes with 1 battery, costs way too much, it can't keep up with my demands. Battery fails, 3 times I return it, where does that leave me?
Joye 510 - Ahh, that's better, no battery failure. Comes with 2 batteries, still won't keep up. Buy a 3rd battery and a PCC. When I go out for the day it still won't keep up. I'm draining them faster than I can charge the darn things.
eGo 900 mah - Ahhhh, that's better yet. Battery lasts all day. I stick an LR on it and it's even better. I could live with this. Oops, I tried a mod, shouldn'ta done that, I was happy, now I'm not.
1st and 2nd mods - AAAAhhhh, this is better, great hit, battery lasts all day. Runs at a higher voltage so the hit is right where I need it. Got a boxmod as a backup. Looks like a pipe bomb, boxmod looks like a detonator button for mod 1. I could definitely live with this, but it looks rough and juice runs inside, gotta find a solution.
3rd and 4th mods - Hit just as good as #1 and #2 but look a lot nicer and are much better built. I can definitely live with this for a long time.
5th mod - Gotta try the Variable Volt option, oooohhhh Madvapes has a VV boxmod and it's not too expensive, lets try it, it can't hurt ya know.
6th mod - Waiting to purchase top of the line VV mod, too expensive, gotta wait for more $$$ in the account. Waiting, waiting, waiting. Still waiting, but I can live with what I've got if I have to.