John Jo Kelly (see http://www.flook.co.uk) uses a mic inside his bodhran from preference - because he then doesn't have to worry about instrument positioning relative to the mic. Certainly the one time we heard him without this (hadn't had time to fit the mic to his new instrument) his performance didn't have quite its usual "fluidity".

I don't think JJ uses a Microvox, but my family have used various of them for concertina, fiddles, high- and low- whistles and oboe, and would thoroughly recommend them - and would also commend the company for good, fair advice. (They happily swapped one of the mics we'd bought when we concluded a different model would work better for our application.)

G.