I have an iPad 2 and I need a device to test my ios app on. I was wondering if their are any consequences to registering a device to be a developer device. For example, can I still use it as a regular device when I am not developing on it? Will I be able to use it regularly if I put iOS 7 on it? I need to start working on this project, so if anyone knows, it would be greatly appreciated. Thanks in advance.
Yes you can still use it as a regular device. All registering does is enable the Developer section in Settings, allow you to install iOS beta releases, debug builds directly from Xcode, and ad hoc app builds.
Also to elaborate on the Developer section in the Settings app, as of iOS 6 and above, that gives you access to the network link conditioner so you can simulate for instance 3G or EDGE speeds when on Wifi. Very useful.