Still using my Go-Gos although these days I use a 510 adapter and drip into it as often or more than I use cartos. Can't really see a reason to replace it when it works so well. I keep running through different flavors from the Vapor Kings brick and mortar store here in town, but my go to juice is still dk-tab. I can vape it straight out of the bottle all day but even better is diluting the 24mg down to 18mg by adding some vg and a splash of vodka/everclear. It's pretty much the only flavor I bother putting into a carto. If i'm not carrying around six or seven different flavors and madly combining flavors at random down my drip tip then I'm chainvaping dk-tab out of a huge dual coil carto.