Thanks, Mike! We threw some darts at this video recently too:http://forums.musicplayer.com/ubbth...but-maybe-not-how-you-expect#Post3001628
It's gloriously bad -- so bad that it's racking up the views on Youtube and therefore doing a stellar job of promoting the microphone.
It's not a great donor mic, though, assuming it is anything like the other BM-700/BM-800 mics I've seen. They are made of the cheapest parts on the market -- really thin metals, bad plating, goofy colors, fragile accessories, etc. The total cost to manufacture this can't be above about $7, so nobody should expect much.
For anybody who bought one of these with DIY in mind, there is one ready-made option. I adapted the audio circuit from the Schoeps CMC5 to fit these mics. Coupled to a selected medium-diaphragm capsule, this yields a surprisingly nice microphone, with a full frequency response, no high-frequency hype, moderately low noise. I'm not sure it sounds very good if you sing into the end of it like in the video though.