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By preferring Bluetooth to Wi-Fi, the YP-P2 has arguably the more useful wireless feature; at least as far as music listeners are concerned. This allows you to connect the YP-P2 to most headsets and Bluetooth speakers for wire-free listening and control. I tested it with a Parrot Party speaker and a pair of Cerulean F1 stereo Bluetooth earphones and found that it worked perfectly. There are rumours on the Internet that you can also use the YP-P2 as a wireless headset by pairing it with your phone allowing you to listen to your music and take calls seamlessly, but alas this feature wasn't available on the test device. Perhaps it'll become available in some future firmware release - that would at least explain the currently-redundant microphone.
You'll need to bear in mind, of course, that using the Bluetooth connection has an impact on battery life. It's a good thing it starts off impressive, at 35-hours worth of battery life without it on, because switching over to wireless mode drops it to an acceptable-but-underwhelming 12 hours. Watching video with Bluetooth on is unlikely to result in usable performance; it starts at five hours with Bluetooth turned off. But there's another reason not to use Bluetooth: it would mean you missing out on this player's strongest suit - its sound quality.
The last Samsung player I reviewed was the YP-T9, which was underwhelming in this department. Not so the YP-P2. Helped by some seriously beefy power output specs (22mW per channel), it has the sort of punch and power that the iPod Touch (and associated Apple products) can only dream of. It isn't quite as clear at the top end and in the mids as I'd like, but the sheer oomph on offer balances this out, and means that larger, more difficult to drive headphones can be used without having to resort to an extra headphone amp to reach satisfactory volume levels. The earbuds in the box, by the way, are okay but nothing out of the ordinary. You'll need a halfway decent aftermarket set to take full advantage of the YP-P2's capabilities.