Superlux ECM999

These microphones have a very clear and neutral high end, which makes them good to record the high bit of acoustic guitars, which is what I'll bought them for.

Since they are omni directional they pick up a lot of the room, which makes them somewhat hard to place, and it also makes them completely unsuitable for vocals unless you have a good vocal booth.

So I can't recommend them as a generic microphone, but they certainly fit the bill for my twelve-string acoustic, and I can imagine them working well to pick up room sounds for drums etc.

They come with a mic holder that requires a lot of force to snap the mic into. It's pretty weird. They also had a small foam bit as a windscreen, but it was flimsy and hard to put on, in fact I broke one. So don't count on those. You probably want to use a shock mount instead.

The microphone itself seems sturdy and it comes with a padded hard case.

Bought 2 of these to use as X/Y configuration for drum OH and to use one of them to "EQ the room" with the bands digital mixer.
Working great for those applications!
For drum OH: When I EQ out the lows the cymbals and high end of the snare really stands out, giving the mix a lush shimmer.
To "EQ the room": Seems to be showing a true frequency curve, and when the room is EQ'd to a flat frequency curve the band sounds great.

Have also tried them as X/Y stereo miking for acoustic guitar and they worked fine for that, although I don't have much to compare with.

The microphone holders that come with the microphones broke really quickly. They are really low quality, so no use in replacing. Bought a couple of K&M holders instead, and now it works great.
Both microphones on their holders, mounted to the K&M X/Y bar i also bought can easily fit into one of the microphone cases, which was great for easy rigging/packing.
(The other case could fit my harmonica microphone, so a free case was included..;o)

I recommend these for all kinds of applications, and of course as measurement microphone.