I get relief from mine...it's one of the few things that has a significant impact on my pain in my ankle. My RSD in my ankle is pretty localized to that one area and I surround it with the TENS electrodes. When I get flares in my upper body I will use it there too...always surrounding whatever area the pain is the worst.

Seems like the TENS is hit or miss when it comes to RSD. I set mine on a constant setting and run it for 30-60 minutes at a stretch usually. I bump up the power on it when the pain starts to rise during the treatments. I have a portable unit that I actually wear all day and just turn on and do a treatment when the pain levels get too high.