A review of the Casio Exilim EX-Z55 is available at DCRP.

The essence of the review:
“Overall, the Casio Exilim EX-Z55 is a good “go-anywhere” point-and-shoot camera that holds up well against the likes of the Canon PowerShot SD300, Panasonic Lumix DMC-FX7, and the Sony DSC-T1.
The Z55 has a compact, all-metal body that fits in your pockets with ease.
The camera has a larger-than-average-sized 2.5″ LCD display[…]. Camera performance is excellent with fast startup time and very little lag while taking pictures. One area in which the Z55 blows away the competition is in terms of battery life[…]. “