I've only had a few MRC sound decoders, and only for a short time, all in Athearn (SD45-2, FP45's). Never had any trouble with any, (although the guy I sold one of the FP45's to did). I agree with dinwitty, their speakers put out great, clear sound (loud without distortion) and the little DC controller for horn/whistles etc is great. Unlike Tsunami which farts and chokes at the slightest excuse on DC, never had a problem with the MRC ones in this regard.