It took me a while to get on to how to use it, too. My thighs do not have enough flab, I think, and so it hurt there. I found that if I use it on the bit of spare tire right above the belt line right on my side and have a band-aid open and ready to slap on, it goes pretty well.
When I think about how hard dealing with migraines used to be, this is great. When I have a headache so bad that I can't see or think and am about to hide for darkness like I used to when I waited for 3 or 4 hours for Imitrex pills to work... then, at that point, a pinch in the side is nothing. When I'm about to go lights-out, I'd take that pinch every minute on the minute for the next 15 minutes to start feeling better quickly.
Sometimes the symptoms seem to intensify for 10-15 minutes but then I start feeling better relatively quick.
The drawback, for me, is I start to wait them out to see if other things help first, then... after playing chicken with the migraine... I could kick myself for not just getting it out in the first place. This stuff cuts down my overall numbers if I use it quick as it doesn't allow it to become imbedded unless I wait too long. With Imitrex, I always needed my 9 because once they got imbedded I couldn't get rid of them.
I now worry about what if I had to stop using the Sumavel.