the aqua is a great tank imo and for those who dislike it because they say it leaks, that's completely user error, period. I guess the main grip I hear is capacity, and as already mentioned, if one fills a certain way, 3mls isn't to bad. I guess if this was your only device, I can see capacity being an issue, but are there a lot of us only vaping one device, I don't really know. personally, I vape at least 2 devices, and as many as 5 through out the day because I get tired of one juice, so I rotate. with that said, I wouldn't care if the aqua could only hold 2mls of juice. I guess the ones complaining about juice capacity are only vaping one set up, and I could definitely see that. good points imo about the aqua is for one, some of the best flavor of any atty I own or have tried. I love the kayfun and own 4 of them but I believe the aqua produces better flavor. I know for a fact the aqua produces more vapor and has better airflow the the kayfuns. another plus of the aqua is its ability to handle a lot more power then the kayfun( to some that doesn't matter). another plus to the kayfun is that you can rewick without draining the juice. so along with those advantages(for me anyways) there are things that aren't as good as the kayfun which are, ease of build for one. yes the aquas deck is small and can be a pain, but once a coil is installed, its there to stay for a very long time, so it takes a little longer to build. juice capacity, definitely smaller then the kayfun. the aqua is 21mm so some may not like it with their 22 or 23mm mods. another con for the aqua is the drip tip hole, it sucks! why did they make it that large? what can be done though is to take any other drip tip and remove the oring, then wrap some floss around a few times and install back the oring. hey to each their own, some like it some don't, but when I hear things like "owe the aqua stinks, it leaks everywhere" or "it gets so hot it burns my lips" or "it only holds 2mls of juice" granted those things can happen, and maybe the mark of a good tank is that they cannot happen, but if built right, they don't happen. anyways, if you haven't figured it out yet, I think the aqua is an awesome tank, when set up right this tank blows clouds, produces awesome flavor, is nice and small, and looks really smart,,,, and that's all that matters in my book. also you can purchase a clear tank for it, if one needs to see juice levels.