Saw one of these things at SMPTE and as they're pretty cheap after some difficulty I finally got one, AUD 169 and it, well works!
I chose the omni version, you can also get a 'half omni' which maybe better if you were to have two to cover long board room tables.
Thing looks OK, about the size of a beer coaster, thin, long lead with mini XLR into mic and regular XLR into whatever. Needs phantom power though.
I doubt it's anywhere near as good as the Sennheiser or AKG units but at a fraction of the price I'm not complaining and as it's only purpose is to be unobtrusive and get what's being said it seems adequate.
I'll give a further evaluation once I've used it in the line of fire.
Bob.