I bought the ADV just a week ago and today I found that the volume controls (up and down) failed. It turns out I am not the only one. Read the reviews on Amazon:
All I did was just wearing it while I was running outside. You would think WEATHER RESISTANT means the headphones can handle a bit sweat, wouldn't you? Both my UM1 and 4R have been fine with that, but not the "crossover" ADV.
I just wrote to Westone and haven't heard back from them yet.
BTW, the cable noise is very, very disappointing. I have to wear the clip pretty much all the time.