Great for adults too
I went to Dr Styrt for Invisalign about 9 years ago. It was supposed to take 3 years for me to complete my treatment but since we were back and forth to the US from living overseas and I couldn't always pick up my trays it took me double that. It didn't matter really because you'll always need to wear something at night and that's basically what I did when I needed to move on to the next tray and didn't.
Anyway, he was super patient with me. In the end, my teeth did not get as straight as he would have preferred, though they looked pretty darn straight to me. He ordered further Invisalign treatment for me (maybe 4-6 more trays, I can't remember) and there was no charge. I now have a regular retainer on top and an Invisalign tray on the bottom to wear at night forever, basically.
His office is really geared toward kids with decor, video games, giveaways, contests and more. But adults receive excellent care there too.