I have had my 636 since 2003 and have had no problems. It is in constant track use for the past 5000 miles. They are nice bikes and enough power to keep up with the 750's at the track.
I hear ya. I have owned a $600 Arai and a $200 scorpion. The Arai looks nicer but the scorpion fits 10x better. They all perform the same function just get one you like to keep on your head.
I have had a storm now for 3 months with no issues. I am not sure what people are doing to them so they mess up but under my normal work use it is fine.