Full Review:  
Thank you for all your reviews, they helped with all the other reviews I've read.  I've used a few other tanks/clearos and they all where all leaky and the annoying pooling on the battery.  But the Evod really holds up.  It hasn't pooled or leaked.  The main problem with clearos/tanks is that condensation build up will all leak on the battery post, I don't think there's way to resolve that (maybe a mesh screen in there could reduce this).  I bought a second one to switch out flavors, getting tired of vaping one flavor.  I want to buy a third one but that's over doing it...lol.  I'm not concerned about being able to use my own drip tip so much, but I go through a lot of napkins cleaning the condensation out of drip tip.  Maybe I'll try a q-tip.  A person drip tip is something I don't need with this one, it's better than the other 3.  Some people say it leaks if it get below 1/3, is measurement on the window or from the clear on window at the top to the very bottom?  I don't if I'm vaping too much or it really does suck juice.  It gives off a lot of vapor, my juice has a little pg in the flavoring so I still think that this gives the throat hit.  It's not a warm vapor and it's kind of airy but plug one hole a it's okay.  I'm using it on a ego-c twist at 3.8v - 4.0v and it's perfect.  This is the only one I will use, I wonder if it could hold up to cola flavors.  Too bad that it's plastic and not glass, but that would be a weight issue on an ego, heavy enough as it is now.  That's my full review.