I have had them all. You name it. I am at a point where my doctor has said that I am just one of those rare hard to treat people that has very sensitive nerves even though my MRI's don't look as bad as I feel so I am left to find more intense treatments. All that to say: When they worked for me it was incredible. Sometimes it took three before I even felt anything, but when it kicked in it was awesome. I went about 6 years one time without needing them.

They are not bad to get and if they work it is fantastic. Don't give up after the first if it does not work. It may take 3 and sometimes 4. good luck