I had my second one under GA as I had failed sedation with the first one (couldn't move or speak but was in a lot of pain.......). The GA was great. I was still very lucid after the initial drug to relax me and they explained at great length I might feel someone pressing on my throat to prevent reflux as I went under - but I never felt a thing until I was waking up afterwards. Had a sore throat and trouble swallowing for the first couple of hours afterwards but basically it was a breeze compared with the "conscious sedation" method!
You can ask for "heavy sedation" (here in the UK) where they use more of the Midazolam but my consultant didn't want to risk it after my stress from the first endoscopy. If it was something I had to have done yearly I might well give higher dose Midazolam/heavy sedation a chance, but otherwise I'll stick to GA!
New stuff: GERD, Recurrent cystitis/Overactive bladder
Lifelong stuff: Food allergies/intolerance, eczema, asthma