Success with Botox anyone?

Hi all, I (52F) have finally followed through, and have an appointment with a dermatologist mid March for Botox injections to treat my craniofacial HH. I'm so excited! As everyone here can understand very well, my extra sweaty face has bothered me for ages and caused serious self esteem/self image issues. I know it's even cost me jobs in the past,vas I sat in interviews, trying to casually dab at my face while sweat tricked down it. I hope these injections will finally result in some much anticipated relief from this problem. Has anyone here had Botox injections anywhere on their bodies to treat their HH and what was the result? I'm wanting to hear other people's experiences with Botox, so I know what to expect at the actual appointment and afterwards. How will the doctor be able to do the injections in my scalp through my long hair? How much less sweat can I expect, and how long until the Botox wears off and I need to go back? I'm so excited at the idea of being able to wear face makeup again I can't tell you! Anyway, I'd really appreciate any and all feedback -- thanks!