Instructions very well and adapt easily feasible. However, several attempts are necessary for the perfect fit, because you just have to get on the handling and proper amount of modeling a sense. Then keep your teeth perfectly and can be easily switched on and settle. Unfortunately, the teeth at the factory are very long and have to be adjusted with an emery board top according to the gumline. Here must be used wisely, because something that is from is from .... The only major drawback is the white ultra-bright. All in all 3 stars.
