I love this app! Paired with Ringdroid, it is a must have app for any droid phone. It does exactly what it says. allows the user to customize their phone and ringers for every person in their phone book. It also allows for custom notification tones. The user interface is super simple and very easy to use. There is a Pro version(paid)that allows for custom LED and even more customization for each contact in your phone book. Just make sure you turn OFF your default notifications in your settings and you should have no problems. I highly recommend for anyone with a droid phone. Currently using on G1