MM-1 : Good to EQ your speakers and to record with.

I use this microphone both to record and to equalize speakers with to eliminate peaks caused by resonances (both by rooms and by speaker cabs).

I've recorded some concerts and used it to record drums as a overhang microphone, for this it did sound absolutely accurate and nice, which is a good thing, as you're able to record it, sounding as realistically as possible, in my opinion atleast.

I've also used it to tune speakers for specific locations (because sometimes certain frequencies get boosted quite a bit, and to get it to sound as flat as possible), where it, again, in my opinion, absolutely does a good job.

Clarity:

I've absolutely got nothing to complain about, the fact it does only reach up to 18kHz isn't that much of a big deal to me as it's still a great sounding microphone doing what i'm using it for

Overall quality:

I really do like the nicely machined seamless metal housing, it appears to be very high quality, and sounds like it too.