I had a gap between my lower front teeth that really showed when I talked. I also had written a cookbook of tender foods for braces-wearers and was on TV a lot, so I figured I needed to do something.
My teeth moderately ached the first few days after each adjustment, but I used salt-water rinses and took ibuprofen. Flossing was definitely a bother, no matter what type of flossing aid I used, but it was worth it to have no cavities or other problems during or after treatment.
Everything else went well. I'm no longer self-conscious about the gap, I love the results, and my mild TMJ even went away so that I no longer have to wear a night splint, just my retainers (which I will gladly wear forever).
The only thing I would do differently was to have realized how much I react to latex: I knew I had some allergic reactions but thought I could have fun with the colored ligatures. Within 48 hours of getting my braces on, my whole mouth swelled up. I had to have all the ligatures changed to clear vinyl, and take antihistamines. After that, all was well. Both ligatures and the elastics that connect hooks come in vinyl.