Well theres no real comparison there. The YiHi is way more accurate but this gives you just as good a
vape after you get the hang of these jtech boards. That YiHi is really reliable not sure about this but for the money you can get a really good tc
vape with this one. Don't know how long it will last but it's built really solid. Just don't charge it with the USB like they say you can. When they get done upgrading I think it will be just fine and you can't beat the battery life but you really need 6 new 18650's and keeps them married up so you have 2 sets. But 2 full days is pretty good.