I've got mine coiled, wicked and fired up now!
I'm using 32ga Kanthal at 2.5Ω/7-8w with a rayon wick.
This the v3.1es is very similar to the Lite version and, with a bit of tinkering, works just as well.
On the plus side: this version comes with the clear tank on the Lite I had to hunt around for that option; the construction is, as expected, clean with smooth threading on each part; has an assortment of replacement parts and wick included; and is clearly marked with the manufacturers name. That last one I prefer since it cant be resold under false pretense someone else complained about that in an earlier thread, but I dont see the problem.
Negatives: Im not crazy about the fill hole and Im finding it messy to plug in and pump the bottle I like the idea, but I find myself defaulting to the sink to be safe and catch the drips; Ive had a couple of juice dumps, but thats more finding the right amount of rayon and getting used to the filling without over-pressuring than anything else
Im finding very little to complain about on this RBA.
Overall, this appears to be a very precise and well-built mod. Im finding vapor production and flavor are very much as I expected from a Kayfun model. Once you get to know it I think youll find its dependable and worth having in you inventory!