I have owned several tanks:
Vision Vivi Nova: hated it. Dry hits, super leaky. Bad taste (but that may have been the juice I was using at the time)
BCC Mega: One of the first bottom dual coil tanks, I believe. Coils are similar to EVOD/Protank, but instead of threading, they push in. Leaks like a sieve.
KPT2: I used this one for a long time, but leaky and gurgly and dry hits. Inconsistent coils. Building my own helped with dry hits and coil life but not leaks.
KPT3: Still leaky but not as bad as KPT2. Had to turn my wattage up to 12 (on 2 ohm coils) just to get any flavor, at the expense of dry hits.
Anyvape Davide with Aspire BDC adapter and coils: best so far. Rarely leaks, when it does it's operator error. Flavor is muted however. Tight draw, which I like. Difficult (but not impossible) to rebuild coils.
I have a Kayfun clone coming, should be here any day now...
