I have a Digifire 7 and a dual channel, 4 output controller. The Digifire I have had for about 18 months while the other is only a month or so. They are both excellent, the digifire can be set to a percentage of output on 4 output and has full output on another 2. I use this primarily as I know once they are set they won't change. The other has knobs so there is always the risk that I will brush against them and change their settings.
Cannot comment on RF issue as I only use for visual, but I am happy with them so far.
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