Lol funny you should mention that, I was literally just on obs' website looking at those tanks I kid you not a minute or two ago...they look very promising and I've only been seeing/hearing glowing reviews for the engine. Especially Mike Vapes, if I'm not mistaken he saids the engine is the best rta on the market. I know I love top airflow anything, what's not to love? Great flavor, no leaking EVER, and even factors into wicking being easier since it's not the end of the world if you dont put enough cotton because it's not,gonna leak. I really don't know why there aren't more top airflow rda's and rta' son the market. I still have my sapor rda's (3), sapor rta, and even my mgnt V1.5 rda in heavy rotation. There's honestly no downside to,top airflow, at least none I can identify, strictly pros as as I can tell/in my experience.