I am 35 years old and have always been self-conscious of my teeth due to an overbite. I just got my 1st set of trays yesterday and so far things are OK. I definitely notice the soreness, and I too had to get the "buttons" or attachments on my teeth.
Those are the most irritating so far because when I eat I can feel them on the inside of my mouth and they make me feel like I have food stuck in my teeth. I'm not happy that one of the "buttons" is pretty noticeable. Also, I am not in the habit of regularly flossing my teeth so that is an adjustment as well.
I just keep thinking that the end result will make all of this worth it, I certainly hope so anyway!