This is an excellent product that will help lots of wind players.
It is easy to adapt to your teeth, the material is good and the instructions are clear. It comes with a case too that ended up as my everyday case for the lip protector.
Even so, it comes with some issues that I feel I need to mention:
The material is good, but stiff, and for me that's a minus. I prefer to use a normal silicone mouthguard for boxers, cut it into pieces and mould it into my teeth shape. Then comes the price. At this price you can buy 3 or 4 full mouthguard which provide you for substantial material instead of just one small piece that eventually you would have to change.
Anyway, I think this is an excellent product and I could recommend it to any wind player. The material choice to protect your teeth greatly varies among musicians and everyone has their own preferences on this.