The Uvo Systems Aqua rocks!! Nothing wrong with a Kayfun, but the Aqua Rocks!!!
You can rebuild some replaceable heads, and never have to buy another one, just wire and wick. Same thing with rebuildables, rba's. But, once one starts building the search for better begins and never seems to end. When you find an rba that wicks well and vapes well at 30+ watts, OMG, I get determined to find one better. lol. Fair warning, once you go rba, one usually never goes back.. I dream of finding something that will put the Aqua to shame. Love my Russian, fogger V3, Term-C, Rockets, well not so much the rockets, lol, but the Aqua Rocks!!!
One could be satisfied with just one or two or three rba, or even replaceables, and never have to buy another. Yeah, right, doesn't happen in the real world. lmao.
Oh, one more thing, The Aqua Rocks.!!! Vape Rocks!!