Just going to post here since i've had my 213 for a week. So far not one single issue, have used power mode a bunch, with kanthal then stainless 316 coils in a 22mm griffin and now a 25mm griffen. Have played with preset 316 mode, also tcr, and also TFR. I've in the past few months used a kbox/rx200/vtc mini/snow wolf 200/ipv3. Even with the unusual instant battery readings that fluctuate the battery life is damn good, better bang for the buck battery life than any of the other mods by far, with the vtc-mini coming in second with accounting for only having one battery. I can get 2 days easily out of 2 batteries, where as the vtc mini would use about 3 or just short for two long days of vaping. The snow wolf was barely lucky to get a day and a half out of said pair. This is all with brand new samsung 25r's in each device as i bought them. No misfire issues here and a very well built mod that's tiny for having dual 18650's in it. The TC/preheat thing is a bit weird ill admit but it does function so far as long as you dont leave the wattage below what said coils need to reach max temp quickly.
Now the big question is do have is about upgrading firmware. They claimed it will have it, but not a word on sigelei's site and they have never offered upgrades for any other device(mind you i dont know if they ever produced a mod even with the capability since i havn't owned a sigelei product in years).
Overall id give it an 8.5/10 so far.
Gunmetal finish is not exactly the most durable thing ever and the TC/preheat setting is a little weird.
Otherwise a solid sleek compact device that delivers. This is all just based on my expierence with MY device so please don't attack me haha.
