It's somewhat amusing to note that Nyko's done as little as possible to retrofit the original Charger Grip to the new PSP. In fact, the picture on the cover of the short manual is that of the earlier model. How did we know that? Well, one of the more noticeable differences between the original PSP and the PSP 2000 is the location of the headphone jack. On the original, it's tucked under the unit on the very left side, which is why Nyko had carved a little indentation into the plastic on the left "handle" of the original Charger Grip so you can plug in headphones. The indentation is still there, but the jack on the PSP 2000 has been moved to the right and is completely exposed, which allows you to easily attach headphones with virtually any plug (with the original Charger Grip, some of the bulkier headphone jacks wouldn't fit).
In the end, our only real complaint is that the Charger Grip is somewhat bulky to carry around along with your PSP. Yes, you can compress the accessory for travel (the two handles slide toward each other), but it would've been nice if Nyko could figure out how to integrate a protective case into the Charger Grip, so you wouldn't have to carry the Charge Grip separately from your PSP. Also, a little fold-out stand on the back that would allow you to prop your PSP up for movie watching would be a nice addition.
Those gripes aside, the Charger Grip remains a good solution for those looking for both a backup battery and improved ergonomics for their slim PSP.