Just got my kayfun in and HOLY CRAP! This thing is awesome! Easy build, awesome flavor, solid throat hit, and it looks sexy as hell! NOW I GET IT! Prefect take everywhere vape, no leaking no nothin. Only negative I can come up with is it's a little heavy, but hey gotta give a little to get a lot sometimes. The whistle is a little annoying, but not that bad. I know I'm not giving anyone new info here, but I rarely get this psyched about a new device or topper. Every once in a while though, something just nails it and this thing does!