I've been using Invisalign for a year and a half now, and I've had great success with it. I had a slight overbite, crowding, and crooked teeth (yikes). Invisalign has done wonders for me, and I'll be done in 5 more weeks. The greatest thing about it is being able to take them out when eating. They hurt the first two or three days when you put in a new aligner, but after a while you get used to it. If anyone needs the $100 off coupon PM me and i'll send you a referral link.