Interesting instruments! The review video was interesting too.
I wonder if the software capabilities with the profiles and chart, etc., could almost be repurposed into a DIY reflow oven controller instead!
Although slightly more expensive (but still very low-cost), I've been thoroughly impressed with the Quick TR1300A (which I recall was also once reviewed by Steve). I got mine from AliExpress, which was a bit of a gamble since I'd never spent that much on the site and had not seen a review at the time. Fortunately, it worked out. But that product doesn't have the software potential that the Aixun devices will likely have if they sort out the bugs, etc.