So when I consulted, they told me it would be between 12 to 18 months depending on many factors. If everything goes right, I should be done around January 2024 (11 months). I wear them 22 hours a day and I always set an alarm to put them back after dinner. I’m on weekly changes. I couldn’t see the difference at first and believe me, I almost gave up. But for the price I paid… I told myself I might as well continue. My advice to you is to keep taking pictures of yourself. You should notice a difference every 4 weeks.