Hold the prejudice :
In before "Cold. Use my phone to play mp3". Yeah - passable sound quality I suppose. I'm guessing you haven't played it for 20 hours though.
In before "Cold. Not a Sansa". The menus on those look clunky mid-90's compared to Philips.
The very first MP4 player I ever bought was a Creative Zen. And after that froze on me several times for doing that highly risky procedure of..wait for it..trying to transfer mp3 files onto it, I took it back and swapped for a Philips GoGear of the time. I've never looked back. I still own all my GoGears and they all still work. Yes they started off clunky as hell and you got varied results depending on what source the mp3 was from. But not anymore.
These things play AAC, Flac, mp3, wav, pretty much anything you throw at them.
Sadly it's not a 16gb model and from checking the Philips page regularly for a long while it looks like this could be the last mp4 player they ever make. Which is fine if you want to just make do with passable audio quality on your mobile phone. But if you really want clarity of sound that you will notice, I wouldn't hesitate to try one of these out.
The battery in these really does go on forever - proof of which I have had a couple of times when after listening to it in bed, I've left it on and playing without realising, and picked it up the following night - to find it still playing. That kind of accident won't ever happen with your phone - have no doubt about that.
Anyway not sure I'll put any further effort in as this will only ever go one of 2 ways : -72 or about 11. Did I mention the sound quality is superior to ipods. Sad but true.