I got my Black Billow V3 today and put a dual SS Clapton build @.23 ohms. I have now found my favorite tank so far. I have had no leaks and the flavor is great. Running in on my hCigar VT133 @50 watts and 450 degrees and I am getting plenty of vapor and the flavor is outstanding. Flavor is as good as the Griffin and the Velocity style deck makes building very easy. It has better airflow than the V2 nano and the pop up top fill functions really nice with just the right resistance and the juice port is huge making filling this tank super easy. I have found nothing at this point to say bad about the RTA yet.!!!!