Not a pro by any means, but I'm almost always happy with the results I get with my macro set up on MFT. As with macro on any system, lighting is key to getting good results, poor lighting means higher ISO requirements and therefore more noise, but get your lighting setup right and the settings to work with it and the results are as good as any other system, and the 2x crop factor means that the magnification with MFT for the same focal length is significantly higher. My setup is an EM1ii + O60 f2.8 + Godox TT685 + homemade diffuser, and when required I also use a Raynox DCR-250 and a set of 10mm+16mm extension tubes.
This was a shot from last spring, single image (not stacked) without any specialist noise reduction... I think that the level of detail and the small amount of noise it pretty darn good.
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