Did it for the 1st time about 6 years ago...had a perpetual scowl...I could not "unfrown!" I've experienced the best and the worst. Loved it the first time. After about 6 or so times, the medical professional who I went to passed away and I tried someone else. It was the worst experience ever.
I became very ill and the lids of both eyes drooped dramatically. In fact, I could not see out of one eye. Thankfully, Iopidine drops helped get me through till the effects wore off - patience is required when this happens...it took about 2 months for me to look better.
Then I waited quite some time and just did not like that scowl when it started to return. So, I'm having it done again.
Pros: a much more softened look on my face. Cons...you really have to select the person administering it wisely! It's also important to adhere to all of the post instructions!