I have Invisalign. I got them 2 years ago and SHOULD be done, but because of money issues.... I'm now in collections w/ the dentist.
Whoops. Anyways, I had a total of 25 aligners because of the space in between my front teeth and the braces helped
tremendously. I've only got a little space left, and have 2 aligners left to go (stupid me not having $$$). Mine were over $6000 total. The first probably 5 aligners were
really painful, like it was extremely hard for me not to NOT take them out, since they're so easy to take out. But after that, the first week of each aligner is always more sore but you get used to it. And it was so worth it, in the long run.
I can't wait to finally complete them.