I have always been troubled by my teeth, but the hospital orthodontic costs are too expensive, I can not afford, until I found this product, the price is suitable, I decided to try it, the first period of time, there is no change, the teeth will be uncomfortable, in the adherence to the use of a few months, I found that my teeth are beginning to become neat, in the direction of a good adjustment, although it is just a subtle change, but it really makes me very happy, are It's worth it. I haven't finished straightening my teeth yet, but I will keep using it!