I was sedated but remember everything. You have to be positioned on your side & throat aligned. A tube with a camera & if necessary very tiny instruments are inserted via your mouth/throat. It wasn't pleasant but it was painless & very quick to be honest. The team were very understanding & really helped me through it. Not worried about having it again in May. Just had a bit of a sore throat for a day or two. The relief after was amazing.
Wish I'd be known about this op 10 yers go LOL good luck.