Had them for a few months- 30 min twice a day. I was suicidal, so my bf got desperate and slipped me acid. Twice. 7 years later, no attacks. Wish it were legal to treat them with acid, or something similar and less radical.
I was also suicidal - had 20 sumatriptan syringes lined up to induce a heart attack, then realised I needed an ambulance instead and good thing too - not only am I still alive, they found my jaw dislocated when I was in attacks which was making the pain even worse.