I had DSM in my Futaba and after switching to my new KO Helios with Super HSR FM I noticed a HUGE difference. The speed in radio response was noticable on the first lap I used it. I would not trade my helios for anything.
Before with the Futaba and FM I would get glitches at my local track. However with the KO and 27mhz FM I've had zero glitches since I bought it. It also allows me to run Japan 27 half freqs which most non-pros don't know about.