Those who believe that only the case of the 550d is made of plastic, is wrong. Even the highly acclaimed display is only protected by a plastic disc. Already my compact camera (TZ5) has a scratch and impact-resistant mineral glass. After two years and three drop it are still no scratches seen. 550d is different with the more expensive Eos. Here only sits a highly scratch-sensitive Plexiglas on the screen. After two days slight scratches were -despite holy Umgang- already exists. This just happens when you carry the camera on the strap around your neck. The display then touch buttons and perhaps even the zipper of the jacket. After the gruesome discovery I immediately ordered the real-glass lens of Delamax. That was easy to apply and actually looks original. Now I have a good feeling when I'm wearing the camera around your neck. Here Canon could offer a little more quality in the future but ..... By the way, the slight scratches can no longer see you, thanks Delamax, now.
