Summary: OK, after reading other reviews here, I just feel myself unlucky. Many compare this HC57 to the older and more expansive HC55. Well, I've tried both and must say, HC55 does look old and a bit outdated (although bluetooth, the NC55 feature could be useful).
Summary: It takes a great deal of time to connect to the iPod. Seems to keep its programming stuck easily and I'm always waiting for it to be 'ready for use'. The sound quality isn't so hot either. I should have shopped for a better quality item. Still considering returning it.
Summary: I also have a HC55, the previous generation of the HC57. I purchased the HC57 due to the AirPlay function, and thought it would be an upgrade version of HC55, but all I can say is that the HC57 is a big disappointment for me, it is turned out to be a cost down version of HC55.