I had and RKL and ill never go back, over six months my head unit lost my pm4s 5 or 6 times which caused my lights and heater to stay on way past what they supposed cranking my temp up and haveing no night cycle and it always happened when i was away the only way to fix it was to reset everything. I switched to an apex lite but because I run a radion and a mp10s I don't need any of the dimming capabilities. Have had no problems since.