It's....decent. The game library is excellent, but it's sad that you have to sift through mounds of crap (Yoshi Touch and Go), crappy ports (Goldeneye Rogue Agent, COD4), and puzzle games (Brain Age, Biig Brain Academy) to get to stuff thats good (MPH). The hinge, though better than the original, still is crap. Mine is loose, and the right side of it can pop up and down about a millimeter. Very annoying. Also, the glossy plastic on top of the white plastic isn't attatched at all, I can pull the middle below the touchscreen out, I can pull the top out, and lots of dirt gets stuck under there, which may one day drift to the screen. A good console let down by crappy build quality...Not to mention sub-par graphics, even for a handheld.
Product reviews by 'LeadBaron'
Nintendo DS Lite

Rating: 3 / 5
Value for money: 4 / 5

Rating: 5 / 5
Value for money: 5 / 5
This scored a 5/5 with me because if you think about it, you are getting a device that browses the internet like a cheap laptop, plays games of almost PS2 quality, get the functions of an iPod except with a bigger, more acceptable screen, and a cell phone-esque capability, all for $170 or less.
Cheap Laptop: $500
PS2: $105
iPod: $300
Cell Phone (Without contract): $150
Total: $1055
Given, the PSP doesn't function the same as these devices, but still, getting all that for under $250 would be well worth it.