I am unsure about IKEA quality. I'd like to see someone like Apple (or Google or even MS take this up)
I question IKEA because they are all over the place quality-wise. Some things are built with quality in mind, whereas others are semi-disposable and I cannot tell what this will be. Will it require and enable periodic recalibration?
At least it convinced me to finally figure out how to get my AirGradient working with Home Assistant.
It's no scientific measurement, but both devices seem to be mostly reacting the same. There's some time lag between the two, and the air flow seems to impact a lot of what they'll detect (the air purifier is more stable in that respect as it's the one creating the airflow), but the IKEA sensor doesn't seem to be too bad in that respect. At least I haven't seen the SHARP one go berserk while the IKEA sensor stays green, if that's what you would be fearing.
Anyhow, it's worth giving them a try it seems.