Good for the money
I've had a pair of these guys for a number of years now. I've used them for recording clarinet, ukulele, and vocals. I didn't know much about audio equipment in general when I purchased these, but I've learned quite a bit since then.
When I'd used them previously, I heard a terrible hiss and buzz, that made my recordings garbage. But WAIT! Having pulled them out of storage, I've been playing with them a bit more. The problem was not the mics after all. See, when I purchased these, I ran them into a cheapy 2 channel Xenyx mixer, and was running RCA to my cheapy usb A/D converter. Not how you do it.
At the price point they are pretty good after all. They aren't Neumanns, but they aren't pretending to be either. As others have mentioned, the sound is rather flat, so you might want to tweak it a bit with your EQ if you don't want it that way. I think as they are they'd make decent overheads, or X/Y on an acoustic. They certainly sounded good on ukulele.
NOTE: If you're considering buying these, do invest in proper preamplification, and nice A/D converters. No Behringer Xenyx's. Their U-Phoria series is much cleaner, and certainly a viable option if you can't afford anything better, but they're still on the "meh" side as far as preamps go. Their A/D converters are pretty great though, if you have rack preamps. I'd recommend one of the newer Focusrites, or an Apollo, if you're doing bare bones recordings.