How well does the cefaly work for migraine prevention?

I don't know: Frankly, never prescribed one yet to my patients, but have seen many times used devices on ebay. Here is the Cefaly discussion group on Migraine.com: <a href="http://migraine.com/topic/cefaly-anti-migraine-device/" rel="nofollow" target="_blank">http://migraine.com/topic/cefaly-anti-migraine-device/</a> It’s important to understand that what is helpful for one will not help another. Take good car