I bought one of these just because I was offerred a good deal($99 new), and liked it so much I bought another. It is a mid-size diaphragm condenser, like the AT 4033, but unlike the 4033, is not an electret. It is frankly a great mic, and the pair is better. It's one of those studio workhorse mics that you put up because nothing else works quite right. It's just short of great on acoustic guit, violin, recorder. Very usable on vocals, good on toms with the pad engaged, an excellent overhead pair.
The 2000B is one of the most versatile, underated budget mics out there. Rather than going the $150 (more or less) ebay route, I like 8th street's deal for $179 with the H-100 shock mount and a 20' cable. The cable's a cheapie, but the shock mount is a keeper which works well on a bunch of mics, from SP B-1 to Oktava MC012's.
C2000B's are the mics I put up when I wish I owned a second C414B-ULS (which I unforunately don't), but it's better on vocals than the 414. They are also the entire mic cabinet of
my suitcase studio, which is based on a Korg PXR4 and a DMP3. They work very well in that role as a near-coincedent pair for recording a solo guitarist-singer, or as a spaced pair for doing a whole stage.
What's not to love?-Richie