I absolutely LOVE M10 rings. The only tiny bit of criticism I have is that you must make sure the little pins that hold the lower ring to the two upper pivot “rings” are pushed in before tightening.
Occasionally I’ll open/close the rings while futzing with scope eye relief and find that, after tightening, a pin walked out a bit, making me start over with the tightening process.
I’ll take this micro problem any day of the week over the issues with traditional rings.