Last night I put set #9 on. CRAZY!!! I'm officially half way there on the top and bottom set. I don't feel any pain on the bottom ones but on the top I feel it pulling on one side. I always forget that I can't really bite down when i put a new set in. Overall I dont feel alot of pain. I'm really happy with the results though. This is the first time I notice that my freak tooth isnt sticking out as much since I started. I als like that my bottom teeth are finally worthy of being shown so I have to start smiling more and letting myself laugh without covering my mouth...yay!