I was still on the fence after watching Christopher Frost’s review. But the consensus is that it’s just bad wide open.
Pete Coco likes the image quality and says it needs to be stepped down a little for sharp images.
youtu.be/HgQjZMvaCnY
Andrew Branch hates the image quality and says it must be stepped down a lot because of field curvature.
youtu.be/1BEXQNmf0Ao
(None of these reviewed the Canon version.)
I’d hoped the TTArtisans lens would be an interesting alternative, but with its apparent flaws and the EF-M 22mm f/2 being so sharp and inexpensive, I’ll just keep the latter fused to my M100 body.