Ok, PBusaro hated it right out of the box. I got one anway. I've had it about six weeks and have put it through the paces and wanted to share in case anyone was looking for a relatively inexpensive mod without going for the full ProVari. First off, I have a ProVari and have had one for a long time. It's fantastic as one would expect. I just wanted an inexpensive back-up/companion MOD to go with it throughout the day.
The looks of it - if you like sci-fi you'll probably love it. I got the black one. Looks like something from a Doctor Who episode or a piece of equipment from the Nostromo. It's considerably lighter weight than it looks. I really can't decide whether it's plastic or aluminum, but is very resistant to scratching and holds up well. I use the red AW IMR 18650 batteries (get a good 12 hours out of one), and it looks cool coming through the slits in the side. It's quite a lot larger than the ProVari, but I have big hands and the size is perfect for me. The ridges on the sides make it very easy to hold. The downside is you may not be able to slip it into a pant/shorts pocket as easily as the ProVari.
To address Phil's complaints: Yes, but buttons are above the OLED screen. That is quite dumb. It hasn't been an issue for me since I set it and forget it, but if you're someone who likes fiddling with menus, it will bug you. I found the menus easy to navigate, but you have to be pretty quick on the buttons. The threads are extremely squeaky, but a bit of Noalox fixed that. The venting on the side and end cap for the battery does seem redundant, but it's a part of the styling you'll either like or not. I personally like it. I didn't have to adjust the spring like Phil mentions in his video. The fire button is large which I like. There's a little 'wobble' to it, but I didn't think it was bothersome.
A real plus to it is the spring pin in the 510 connection. Sometimes (for me anyway) Protanks act strange on the Provari and won't fire because the connection on the tank is just a tad too recessed. I'm sure it's user error on my part, but the spring pin on the Tesla eliminates that. The 510 connection is a touch raised from the edges of the device, so air flow is great.
In the end, this thing performs beautifully. I have it sitting side-by-side with my ProVari and love using both throughout the day. Sometimes I find myself going for it since it's a whole different feel. I paid a little less than half of what I spent for the ProVari and feel I got a good product. That being said, if anything ever happened to my ProVari, I would probably replace it. It's like owning a Jaguar, but having a Kia for a daily driver. Kia's are nice too.
Got it at Vapor Alley, but lots of places carry it, including our local B&M store.
