I received my Wismec Presa today from GearBest, and first look is impressive! I got the silver one (anodized Aluminum) rather than the black powder-coat, because I hoped it would not fade or chip color as badly. Nice packaging, battery arrived fully charged, and the APV included a very long USB charging cable (standard micro-USB) and an eGo adapter so you can use eGo threaded tanks. The unit has a built-in battery (2600mAh), goes up to 40W (or 10V) in 0.1W increments. It is switchable from VW to VV, and the screen flips to read from the left or right (a nice feature). The adjustment buttons are easy to reach and operate, yet their placement makes it very difficult to accidentally press them as you use it. The buttons as well as the fire-button are also lockable so you cannot adjust or press the fire button without unlocking. There is also a spring-loaded 510-pin, which so far has connected perfectly with all of my tanks. The battery also (supposedly) fires coils down to 0.2 Ohm, which will be tested with my Arctic Tank. The only thing I've not been overly impressed with (out of the box) is the fire button is not perfectly smooth, but I think it may smooth-out as it is used? I'll be using this daily for a week or two to give it a real work-out and see how well the battery does and how long it lasts between charges. I'll also be using it with different tanks, including a sub-ohm tank (or two). Compared to my Cloupor (slightly taller than Cloupor, but same width and roughly same weight) With a full size Nautilus attached