I can't speak highly enough about this mod. I spent a while looking for a compact, powerful and versatile mod and kept coming back to the RX2/3. One thing first: the max wattage isn't exactly accurate anymore. With a firmware update, the RX2/3 can go to 200W/250W. That said, the mod itself is a delight to hold. With two 18650s, it's nearly as small as some single battery mods and SUPER comfortable to hold. Three batteries tends to be "max battery life" more than "max wattage" so it's a great option to have when I am less concerned about bulk. With three 18650s it is still shockingly compact, plus the iconic Reuleaux hexagonal shape fits in your hand perfectly. Function wise, it is a workhorse, with easy enough to access menus and some nice customization options. Fit and finish is pretty good, definitely helped with the latching battery doors, vs the magnetic one on the RX200. My only negative comments would be about the UI (awful on all mods) and missed opportunity to access/change settings from a computer, like firmware and logo are. I could never knock a star for such minor complaints. I would definitely recommend this product.