It's a nice interface to deal with multiple calendars from different sources (like 2 different Gmail accounts). That wasn't as easy to do with the regular GCal.

It's a nice interface to deal with multiple calendars from different sources (like 2 different Gmail accounts). That wasn't as easy to do with the regular GCal. It's quite a bit faster than GCal on the desktop. Sunrise's Android app is comparable to the GCal app on Android 5.0.