Oops the Amazon is the wrong model number.. B&H has it for only a couple of bucks more, but found this review off B&H sight interesting.
This battery is mostly bought for one of the worst reasons a consumer would want: because we have no other choice.
Panasonic has recently added the 'ID Secured Battery' concept. This means, Panasonic cameras will only work with Panasonic batteries. This leaves out of the game a number of battery manufacturers who could be offering some equal quality (or sometimes even better) at a lower price.
Don't get me wrong: This battery is a good battery. Has fast charging time, and has a reasonable working duration. The point is, it's not the largest capacity battery in its size, and, sometimes you'll end up needing more. I'm using a Lumix ZS7 which has GPS in it, and there's no way I can have it on all the time, not even having a spare battery (ID Secured, of course).
There's a worst part: This battery is not cheap. Can't blame Panasonic, you're stuck with their batteries, so why not make an extra buck with them? You could be getting generic batteries for a fraction of the price you'll have to pay for this. But you can't.