If you are looking for the best protection for your Sony Ericsson P900 or P910 then the Crystal Case is certainly the way to go. It is made of very durable and scratch resistant polycarbonate plastic. The case covers almost entire phone, except for the flip, and has cutouts providing access to all buttons, jog dial, memory card door, stylus, camera, loudspeaker, etc.
The screen is protected entirely with a transparent flip. In flip closed mode you can operate the phone with the plastic flip closed. To access the PDA and use the touch screen, simply open the transparent flip and, as usual, the keypad flip.
The case is very light and it doesn't add much bulk to the phone. With the Crystal case on you can still use the desk stand and other accessories. It even has a hole for the hand strap.
You can buy Expert Shield Crystal Case from SymMobile