There are no bad reviews because it’s a pretty good speaker. I have owned the big brother, the M3 Turbo S for at least five years, a record of sorts for me.
They’re great speakers in general, and excel at playing loud and clean, virtues I enjoy in my open layout living room. They are not the last word in resolution, and I’d say they lean toward ‘warm’ in their sound. They image well, and the concentric compression tweeter makes the speaker sound ‘of a piece’- coherent and without a sense of hearing woofers and tweeters.
To me the only downside is their look- but that’s subjective.
If you’re on the fence about trying a pair, get off. I see them pop up for sale from time to time at great prices…