I took this product once and it made me terribly sick!!!
The only thing I found that helped me soothe the pain is an exercise program you can find at www.tmj-help.org. I think i paid $50 for it (it's not even a 1/3 of what i pay for a normal dentist appointment....)
It is really cheap comparated to all the stuffs I tried in the past and it is the only one that really works (well, pain killers work too but they don't make the disease better, they just hide it for a minute...).