I love the Derringer. I haven't got that excited about an RDA since the v2 Tugboat came out. I have been doing a .2 24g and the flavor is just fantastic, the clouds are good to if your into that. I have two others and one has a regular old .5 ohm 28g build. I am not a fan of it but my room mate uses it and he loves it. The vape is really to cool for me. The one I rock the most though, the build I LOVE in this little guy is a parallel 24g .25. I keep grabbing my mech topped with this one rather then the regular .2 24g. The flavor is really noticeably diffrent. If you want GREAT flavor I would say try out that build. The clouds are good to, nothing thats going to win a competition but there pretty decent. Where it shines is in the flavor department, warm, thick and dense plumes of flavorful vapor. It kicks in sooo fast to, I press the button take a 1.5 (roughly) second draw and its perfect. If I take a longer draw like a five second draw it really puts out the clouds. All in all I like the parallel build the best. I have really been enjoying parallel builds lately.