For the Quattros, I never paid much attention to localization. With the Omnias, it might be a placebo effect from ReSound’s advertising, etc. I am much more aware of sounds being pretty well localized, especially if I’m looking in the direction the sound is coming from. When I’m washing dishes, running water, and clanking (just a bit!) dishes and silverware, my brain tells me it “sees” where the sound is coming from. I’d say the localization effect works best for sounds that are close by, or, if at a distance, very loud sounds like the shrill cry of a bird. I am close to the amplification limits at which M&RIE receivers can work without generating a bunch of feedback. If my molds move around during the day and I come close to a wall or door jamb, I can hear a bit of a buzz sometimes, and that’s a clue that I need to firm up at least one of my mold positions. I think an advantage of the M&RIE mics is that they’ll be less likely to clog with scalp debris than the body mics on the back of the HA’s. So far, I’m glad I opted for the M&RIE receivers.
As Ureout has pointed out (ReSound Omnias with M&RIE Receivers - #37 by Ureout), there may or may not be little white filters on one’s M&RIE mics. It would be nice to find a cheap source of these filters in the U.S., as well as a source for the special tool required to replace the filters. My audi was not very helpful when I suggested finding out more about the subject.