Particularly noteworthy is the remote control supplied with the X80iP. It's pretty small and unimposing, with the usual array of volume, power, track, play mode, and equalizer toggles present. What's special is that where other remotes that purport to offer iPod control utterly fail to work with an iPod touch or iPhone, this one does.
Whether from a docked iPod or any device hooked up via the rear-placed aux jack, there's nothing particularly special about the X80iP's output. There's okay clarity, and a reasonable bass presence but the mid range, in particular, can sound a little incoherent at times. Fiddling with equalizer doesn't help, but simply distorts the sound unpleasantly.
As the price would lead you to expect, the audio produced by the X80iP is hardly in Philips DS9000 or Zeppelin territory. Actually better comparison comes from the significantly cheaper (though battery-less) Klipsch iGroove SXT and Altec Lansing inMotion Max. The latter and the X80iP certainly look eerily similar.
If you're after a portable system, the iGroove SXT is obviously ruled out, but otherwise it's inarguably the better choice. Especially considering how much cheaper it is. The inMotion Max is certainly no competitor to the X80iP, which sounds better in every respect - even if that's not the hardest accolade to achieve.
The X80iP iPod and iPhone dock has a number of flourishes to recommend it, such as the iPhone-controlling remote, the funky retractable dock and the large rechargeable battery. However, if you're more interested in audio quality these features will likely prove superfluous and even if not, this is a very expensive dock.