I'm about 5-1/2 to 6 mos down my vaping 'road' - have used rebuildable clearomizers and non-rebuildable (when 2 clearos broke in my jeans pocket out on our quad for the day) so I purchased two Kanger MT3s and liked their performance but didn't like how large they were. I next got a couple Kanger EVOD tanks (clearomizers) and really like them, they are shorter than the MT3s and most of the time if I'm using 2 different ones/flavors, they'll last me all day long before I need to fill them again. If you get any gurgling or juice in the air tube, use two of the little silicon end caps over the coil/wick areas - end to end and that will stop fluid going up the air tube when laid down or tipped down - cheap fix too! lol I use some ego twist variable voltage 650 batteries and they last me a good day and a half each. Nice setup for me. so, yes, I've had problems with Clearomizers (from different sources breaking, leaking, not working right without tampering with them, ie, crookedly assembled - a tap with my hammer straightened them out quickly tho - lol - would rather rebuild my own atty heads on the evods than mess with the clearomizers any more (refilling on the go, draw was hard on a couple of them, replaced the atty heads and then they worked good)...