mine's just about a month old now. But i've been putting it thru the acid test. I go gyming dailey. And i end up drenching it (literally) in my sweat. Has not given me any problems. I just try to make sure no sweat enters the charging port. That is a major issue. I've been thinking of covering up the charging port with cellotape before gym.
A peculiarity I noticed. On my bike, the music breaks if I drive above 60kmph.
And the mushroom earpiece needs to be cleaned regularly. Dust keeps accumlating under the mushroom head.
I dont think longevity would be an issue. But i've read there are chinese fakes available. And its not easy to check for originality. They would probably have this issue.
A1200 Mischka's 24xp30
Try the Zeus skin. It's realy cool.