I was looking for a top-coil glass tank alternative to the iClear 16 which had served me well until I started vaping some new juices which caused the polycarbonate to degrade. I decided to order a Vision vFate mini and have been using this with a Volt X2 900 mAh battery with 808-to-510 adapter for about 2 weeks now. There are a few issues which have come up: 1) After carefully refilling and assuring that all connections are tight (including the internal post-to-coil), after a few vapes fluid seeps through somewhere and pools at the bottom of the oval metal window opening. 2) The longer wicks of the i16 reached down nearly to the bottom of the tank. The wicks in the vfate stock coil are quite short, and you either have to refill frequently or else tip and roll or invert the unit to keep the wicks from going dry. 3) It is next to impossible for me to visualize the juice level balance through the window unless the juice is darkly colored. If anyone has any advice as to how to handle issues #1 and #2 (maybe trying to fit an O-ring or something to that effect into the top metal connector piece), I would appreciate that. On the plus side, my order was processed and delivered to me in a speedy manner.