Bought my first Nautilus 5ml tank online and was like Ralphie waiting on his secret decoder ring. I got it, assembled it, filled and primed. first 2-3 hits were amazing. then the burnt took over. I tried everything. adjusting airflow, raising/lowering watts, letting it sit(as long as I could), 1.6ohm, 1.8ohm..... Nothing worked. Burnt toast. I felt like I had shot my eye out with my red rider. Angry, disgusted and hurt I went to my trusted vapor retailer and he told me the BDC coils are crap. In fact, they arent even stocking them! Too many complaints and defects. only special order. so I bit the bullet and paid $3.49 for a BVC 1.8ohm, trusting his recommendation. lemme tell ya... this thing is a beast. Im pumping 13watts thru it right now with a 70%VG mix of "Havana Tobacco and Menthol(1:1)" and it performs flawlessly. Im not a cloud chaser, but I sure am finding them quite often. hits the back of the throat like a e-ninja. Fill this bad boy up, drop a freshly charged 18650 in and im solid for the entire day. BVC is the truth. Best coil ive ever used. And believe me, Ive been around the block. Ive got Evods, Protanks 2 and 3, Aero and nothing compares to this aspire BVC rig. Im in love. The drawback is it does go thru some fluid(granted my vaping style is the culprit), but a small price to pay for such a satisfying draw. I think ive found my soulmate with the aspire, and no disrespect to Kanger but they need to step it up.