I went to the local B&M today and decided I wanted a carto tank. I decided on a Smoktech UDCT with a Pyrex tank. Im using 900 mah ego batteries. I could see a difference over my clearo right away. The people behind the counter showed me how to fill and prime it. When I first tried it I was using a battery that I had been using for a few hours and I still got more vapor then I did out of the clearo on a full charge. Decided I would get some new juice to try it with so I tried a couple samples and picked Sweetie Tart(18mg) made by The Next Vapor Spot. Best juice I have had so far(only tried a few flavors) and it may be my edv. I find myself vaping it just for the flavor and have to force myself to put it down. Does anyone else have experience with this tank? Any good or bad things about it? Did I pick a decent item? Any input is appreciated.