Well, I've got one, but I'm not sure I can give you much information that you might find useful. First of all, I have absolutely NO experience with other low budget LDC's, so I have no frame of reference to compare it to. When I worked in a commercial studio (which was a long, long time ago) we had high quality, professional LDC's to use. So, I've never used an SP C1 or B3 or an MXL 67 or 69. Furthermore, I haven't put a second hard drive in my PC, yet, so I haven't done much actual
recording. I've only recorded a few seconds at a time, so far, just to make sure that my Firepod is working. So, all of my critical listening was done through a Presonus MP20, into a Lexicon 550 (sometimes bypassed), then into quality headphones (AKG 24DF's), straight out of the MP20, for monitoring. So, take this all with a grain of salt (or two or three).
What I will say is that I'm impressed with what I've heard so far. I really expected it to be pretty much useless, but since it came free with the Firepod, it wouldn't have been any big deal. Most of the things I've noticed were touched on by the other reviews that have already been posted. Little to no proximity effect. (And that's a good thing in my book.)
Very slight presence boost. Sounds pretty "natural" and un-hyped, overall. Even more importantly, as far as I'm concerned, is the QUALITY of the high frequencies that ARE there. I've heard lots of audio gear (speakers, preamps, mics, etc...) that had plenty of high frequencies, but the highs that were there were so grainy and/or brittle that they were just plain unpleasant to listen to. Not so with
the AT2020. Very smooth throughout the entire frequency range. Altogether a very nice, and completely useable tone. I'm very happy with it.
Bottom line, I'm still planning on buying some more LDCs, but I fully expect to find LOTS of uses for this mic, even when I've got some pricier ones around to give me more sounds to play with. Sounded fine on my voice, and even sounded pretty decent on my acoustic guitar.
Hope this helps.
Brad