Hey Girl! I use just the tank/carto setup, tho I just got an atty for my kr8's for testing my DIY juices. Obviously, it's not gonna taste the same as a tank or clearo, but it seems to be the quick test of choice amongst the DIYers. Let's you know if you're on the right track, getting close, etc., before you try it in a tank or clearo. And so far, after maaaaany samples, I only like RY4 and Highbrow's version of American 55, so only 2 flavors to deal with. We got our new clearo's in for our kr8's and they give AWEsome vapor and flavor -- almost like my Nova!! So they make great testers, and these new ones are a screw-off, rubber stopper top, so VERY easy to fill and clean! I use them for sampling and backup and DH is in LOVE with them!! He even had me order him a new fat batt to use them with!