I love the glass tank. My issue is I got thru a lot of e juice LOL. I like to see all the clouds of vapor......I'm wondering if I'm not using too much nic at the end of the day. usually, 50 mls of French vanilla lasted me a month and a half with 1.6 ml mouth pieces.....with the protank type products I can go thru a 50 ml bottle in no time. I LOVE the bottom coil vs the strings /wicks in other products but then again, in the other 1.6 clear's I don't over vape and I can vape as long as I want and use less e liquid....I DUNNO, I LOVE THEM ALL.