Has anyone done sedation dentistry? I am petrified to go to the dentist and haven't been in years.?

My teeth aren't in horirfic shape because at home I have excellent dental habits. ( I use a sonic toothbrush 3 times a day, floss, rinse, don't eat many sweets, ect.) But I have noticed one little piece of filling has dislodged and I know I should go. In my area there is a dentist offering "sedation dentistry". They semi put you out or in "twilight sleep" and you don't even know anything until everything is done. They can do hrs. of work in one visit instead of coming back for multiple visits(and multiple sleepless nights worring about it!) If anyone has had dentistry this way I'd be so happy to hear about your experience.