It's somewhat of an old topic, but I thought I'd chip in my two cents about this mic. Keep in mind that I don't do this professionally - I'm a hobbyist/home studio guy who spends way more time and money on this stuff than he should. So, take anything I say with a grain of salt.
I've had a Woodpecker for over a year now, and I seem to have a real love/hate relationship with it. When I like it with a source I REALLY like it. When I don't like it, I REALLY don't like it. For comparison, the other ribbon mics I own are a pair of Cascade Fathead II w/ Lundahl transformers, a ShinyBox 46MX, and a ShinyBox 46MXC w/ Cinemag transformer.
Compared to the other ribbons, the active Woodpecker outputs a much hotter signal (which of course would be expected since it's active). It doesn't really sound like what I expect from a ribbon, though. It has much more top end than any of the other mics, almost more along the lines of what I expect from a large-diaphragm condensor. Because of that I find myself reaching for it in applications where I normally use a condensor as opposed to situations where I'd try a regular ribbon.
It has become my go-to mic for acoustic guitar on rock songs. It manages to capture a detailed and natural sound that takes EQ well, while keeping the top end much livelier than a normal ribbon mic. I don't particularly like it on electric guitars, although I'd be hard pressed to explain exactly why. It just doesn't seem to smooth the top end like a normal ribbon does, while simultaneously not providing that midrange bump like a 57 that helps cut through a mix. It can work alright with a cleaner guitar sound, but for distorted electrics it just doesn't do it for me. However, I've heard other people say they like it so take that for what it's worth.
I like it for percussion when I want a good, natural sound with some room in it. And every once in a while I reach for it on vocals, but I normally reach for the Gefell MT-71S first on those.
All in all a mixed review, I suppose. It's a good, useful mic, but like every mic it works better on some things than on others. I consider it to be well worth the price, though. If you can try one out, I recommend doing so.