Great product! I wholeheartedly believe that this will be the future for straightening teeth. The aligners fit amazingly, are hardly noticeable and yet I didn't even leave my house during the whole process. I highly recommend for those who are looking for a cheap/ flexible solution to minor to mild teeth crowding or gaps. I have had my kit for about 1/2 months now and am honestly very surprised. The service during and after the purchase was very cordial, and the process was extremely quick. I expected the shipping to be far longer than it actually took (it came within about 1 week of purchase). After getting the box, one of the aligners (the very last one) was squashed by the box when it was being closed, and I notified the team via email, they sent me a new one within 3-4 days. That was a little detail that showed me the Smilekit team are dedicated to giving you a good experience. As for the aligners. They fit very snug on your teeth and they hurt for the first night or two. After that you get used to it. It is the same difference in pain each time, so by the 3rd/4th aligner you are much more comfortable with the initial feeling. My case was minor to mild gapping on my upper teeth and so it may be a different experience for someone with overcrowded teeth. However, I am certain that they are far less painful than braces (my sister has them and never stops complaining). Overall, I am really impressed with the product. It has saved me a lot of money, a lot of self-consciousness, and has helped me become a lot happier with my smile. I am still only on my 4th aligner now but i am already noticing a difference. Thank you smilekit!