It definitely works and has seen dramatic improvements in the last few years. At first the company was just trying to make it, now it has become a force in the field.The process for Invisalign goes as follows in my office:Complete orthodontic exam including necessary x-rays and photographs.Scan for digital images sent to Invisalign.A tech makes a movie as to how the teeth are going to move and the order.The doctor reviews the movie and makes changes. This is where the rubber meets the road. If the doctor simply hits the accept button, your treatment is decided by a tech with no orthodontic training other than the training to make that movie. They are not doctors and they are certainly not orthodontists. If the accept button is hit, that is who determined your treatment. I can honestly say that it is almost never acceptable to me without my modification. this is why you chose a doctor- is the doctor an orthodontist or general dentist? does the doctor really do Invisalign or just says they do and guide to braces? Are they a general dentist who went to a weekend course?As to fees: My fee can be as high as $6800. I include case refinements( rebooting your case and going thru all the previous steps and providing additional aligners as necessary), all x-rays and 2 sets of retainers. 2 years of follow up. Detailing of the bite.Your choice if you think it is worth it. Cheers Dr H