I got myself braces at the age of 28(7 years ago) My Orthodontist was(is)a great guy and he recommended that becasue I wasn't the traditional patient(12-16 years old) that if I felt uncomfortable with the 'brace face' look, I had the option of doing the clear on the top but recommended the traditional metal on the bottom(thats where most of my isses were) It's what I opted for, and I loved it! I don't think that the invisalign was avaliable at the time, but I know I would have still went the route I did. I would go in for weekly adjustments-they take off the rubber bands that hold the aligning wire on, make any adjustments they needed to and put new rubber bands in. Just becasue I could-cost was included and I loved being able to make sure they stayed much cleaner that way. After they were taken off, he did make a retainer for me that is what I would imagine the invisalign to be, a clear tray that is a mold of your teeth, but it took some getting used to, I would forget to put it in, you can't eat with it and it does stain of you do forget. I didn't care for it too much. With the braces it was just something that was there after a while, you didn't have to think about it.
Hope this helps your decision.