I'm on my second EXO-400 helmet. I used the first one for 5 years. It took a light hit last spring and was getting a bit tired on the inside. Plus, don't "they" typically say 5 years is about the lifespan of a helmet??
Anyway, I wanted a replacement and went with the Scorpion again since the first one performed to my liking.
Luckily, I've not had to deal with their customer service folks so far. But, it is good to know that they have treated you well thus far.