I've had 2 banded; primary care MD checked with his gloved finger (same procedure as a prostate exam) to see if he could find out why I was bleeding.
Off to urology later that week for the diagnosis; on my hands & knees on the exam table wearing just a shirt, dr inserted two different scopes & a light to verify that there were hemorrhoids just inside the tailpipe.) They did the banding at the same time, soon as they confirmed the problem.
The whole procedure was about 20 minutes start to finish, they had me kneel on one end of an exam table knees spread apart, the middle of it was raised to support my chest & stomach. Tray off to one side that held a scope, the banding gun, and a LONG needle that they threw a towel over as soon as I said "WHAT'S THAT??"
Felt a sting, probably the needle with anesthetic; 10 minutes while he banded them one at a time, each one took about 2 minutes and wasn't really uncomfortable, loud SNAP when he banded each one and felt a pinch inside my ass at the same time.
Went back to work and after about 1 hour, started to regain feeling and my butt started to REALLY hurt. Increased for about 2 hours and just as I thought I'd have to leave or go back to the dr. (felt like a sharp rock had been inserted) the pain stopped. Remainder of the week I had a feeling of fullness and a slight ache in my butt; lasted about 5 days then gone. The bands just sloughed off, never noticed when they were gone - job done, they fall off somewhere along the line. Followup appt couple weeks later took about 5 minutes, he looked inside with a scope & said "Done!"
Haven't needed to have it done again in the almost-10 years since, but wouldn't think twice about it if needed - quick & relatively painless