Finally got mine yesterday. It's no fault of vlk, he packed and shipped my order within hours of me placing it, it's just the reality of shipping from CZ to the US, especially right now.
I have no words to express how much I love this thing. I bought a 2.2mm chisel tip to start because it's a nice middle of the road size for the soldering I do. It is at least as good on big pads and wires as the 5mm tip on my Hakko station, if not even better. It heats up literally within seconds, like the video shows. It's really easy to set two temperatures and switch between them as needed. It's very comfortable with the Weller tips.
vlk has been super responsive when I had questions, and given me helpful recommendations.
The only issues I have are no fault of the device or its builder. 1) The case that I printed for it doesn't fit all that well. It's probably a combination of my print not being perfect and the tolerances being a little tight. So I'll have to work out a solution to give it a nice case. And 2) my Hakko 888D will complain that I never use it anymore, because I don't think I will. This little portable iron is going to be my soldering iron for all the work I do. I have a 12v supply on my bench, and when I'm away from the bench, I can put a 3S LiPo in my pocket.
Just, absolutely fantastic. Best soldering iron I've ever had in my life.
Awesome soldering pen, very good for SMD soldering. Interface is really intuitive, and the soldering iron itself seems to be faster than a Weller station. You might want to 3D print the casing which is linked and do some mild shaving/sanding on the inside of the casing - If it's slightly off, it'll break the screen when you try to close it. Overall great product.
Very nice formfactor and intuitive to use, my new best friend (in the soldering pen category that is ;-) Initially it didn't want to heat up when connected to a 4S LiFe (A123) pack of 13.7V, but this was fixed in firmware 0.2.0, thank you. The shrink wrap tubing 'casing' is fine with me, but if a nice case comes out I will of course consider it.
Although there is a bit of DIY work when you get it, it is well worth it! Interface is simple and intuitive. A reasonable sized 3 cell Li-Po battery pack provides a great portable power unit that makes this the perfect soldering solution on the road as well as in the shop. I found some very flexible AWG 20 wire for power and a bit of clear heat shrink for a case and made this the perfect lightweight soldering too. Well done!