Even though Cover is still in beta, it's an excellent lock screen replacement. If you use specific apps while you're at work versus at home, Cover will be helpful. The lock screen replacement learns more about you and the apps you use over time.
It presents different apps on the lock screen depending on where you are. For example, if you're at work, it'll include apps like Gmail, Evernote, and Google Chrome on your lock screen. When you're at home, it may show mobile games or news apps you frequently read.