i read this older thread, think the m10 has brought a revival of the MS957 (?). found such a microphone nearly unused, came years years ago with a sony dat recorder. now i proved it and found it sounding best on sony machines. on all of them, dat, md and m10. has full sound and usable stereo picture, but not so with other 1/8" pip entrances (sounds thinner in middle and bassy in side regions). couldn't find how sony did it. the mic layout came from dat times (no more than 2v pip). one of the two membranes (not small, 1/2") is obviously an eight and works defining the stereo effect, other cardoid. microtrack runs 4,5v pip, not too bad on some pro lapels if there's no wireless connection, holds good runtime with camera gear, has not so bad noise shaping like told in the web. but helas, preamps soundwise aren't better than all small user gear: all sounding like soup without bones.
myself am using neumann, gefell, dpa, dyn md441 with pro mixers. yeah sometimes on small recorders too. bad sound makes post cleaning extra work, endless lack of character.
who has a MS957 on older or newer sony gear, try its a bit strange stereo concept, worth an playing adventure, turn it around: sounds fuller than inbuildt todays recorders mickly mics, has handsome 1/8" xlr5 stereo cable, not too much self noise for an electret .... and no problem with feeding 1/8" pip.