Got one with some of my EBGames store credit, modded it, and then I'll trade the old PSP back in later (you need one to mod a slim PSP).
This machine's so awesome. It's so light that the system is now much more comfortable to use, it truly feels like an handheld.
The d-pad and the buttons are improved significantly too, now you can play some of those 2D games without the experience feeling like a chore, and hold a diagonal direction without breaking a sweat. The analog stick is somewhat improved too. The d-pad is a bit harder on the thumb, but you get used to it very quickly, and can play long game sessions without having your thumb feeling sore. Playing Metal Slug Anthology is a blast.
A fair level of ghosting remains on the screen, but it's not bothersome. Colors are really better too, and the picture is sharper. It really sucked ass to stare at the old PSP's screen for hours on end because that shit was pale, but not anymore. Now it rivalizes with the DS Lite's color reproduction quality. As I'm about as severe on picture quality as dark10x, I really appreciated it and am never going back to an older unit.
Get this shit as soon as you can, it rules. The PSP is the best handeld system ever now, with an ever-growing software library full of deep titles that make the DS' game line-up seem like a sorry joke.