The only slightly annoying bit is I think sometimes on low setting then it actually does on/off of a higher one.
So 400W might be alternating 800W/0W for example rather than a steady 400W.
But then I think some cheap microwaves do the same. And it’s fairly quick on/off so you don’t really notice it.
It's pretty common for most cooking appliances, microwaves particularly to run power fully on-off to give you a percentage (bang bang control) as opposed to PID control which would run the element / wave generator at a duty cycle
Worth having I reckon
The only slightly annoying bit is I think sometimes on low setting then it actually does on/off of a higher one.
So 400W might be alternating 800W/0W for example rather than a steady 400W.
But then I think some cheap microwaves do the same. And it’s fairly quick on/off so you don’t really notice it.