I personally think it helps me, but without quantitive measurement of my improvement, who knows? What
they do say is that MMJ helps spasticity, and helps with paresthesia.
For example, I was feeling really crummy this morning - fatigued, my back ached, and I could feel a little of the back myoclonus coming back. After I had taken my medicine (!) I had more energy, was able to actually sit up, and could think about stuff I had to do that day. How does one measure that?