First off, the LCD isn't glued to the glass panel in front. That means that if you do drop your device and break the glass, you won't necessarily have to replace the LCD as well.
Inside the device, the removable battery and microSD slot include user instructions on how to properly replace the cover and remove the battery. You might think that should be obvious, but you'd be surprised how many people have broken a cover or damaged their battery with a flat-head screwdriver.
While we're on the topic of user information, we should mention that there are no 'warranty void' stickers inside the device. That will make it easier for users to take their device to a local repair shop, rather than spend a small fortune on a completely new device.
iFixit also lent some insight on the relative density of the ATRIX 4G's components. Only two primary ribbon cables connect everything from the front-facing camera to the headphone jack pressure contacts. These cables measured only 0.17mm thick, while a ribbon cable from an older Dell PC is 0.66mm. For more detailed images, and a full breakdown, check out the iFixit link below.
source: iFixit via Gizmodo