You hear so much about the newest 510 cartomizers and atomizers, 306 atomizers, and 808 cartomizers, but there is another contender that is often forgotten about. The 901 atomizer. I had heard about this guy a couple of times, but never really gotten any solid info. So I decided to give one a try. I got a 901 2.5 ohms, and popped it on my VV. I have no idea what voltage I'm running, (If I had to guess it would between 4 and 4.4) and the flavor, and chest hit (not throat hit) are wayyy better then a 510. It also stays wayyyy cooler (temperature wise) the a 510 of the same nature, and the hit is not so tight. I think this might be my new main atty. Wowsers. Give this guy a go if you haven't.