Compline is an amazing prayer of the Church. It began as a monastic office to complete the day. The current use splits up the psalms throughout the week. The monastic office traditionally included many of the current ones, but the same every night. On a personal note, Compline has always been one of my favorite since it was the first I ever prayed regularly. When I first talked to the vocation director about seminary, he handed me a Shorter Christian Prayer, and said he’d only give it to me if I promised to pray it every day.