Being a Nexus device gets you a few nice perks from big daddy El Goog. Nexus devices generally get new versions of Android before other OEM smartphones or tablets and Google provides full factory images available for your downloading and flashing pleasure. If you’re of the custom ROM breed, it’s a good idea to keep a local copy of your device’s factory images just in case you ever need to go back to stock. Additionally, factory images can also be used to manually upgrade your Nexus device if you’re tired of waiting for an OTA update. If you’re a developer, you’ll be happy to know that the latest binaries are available as well and can be found in their normal locations.