I've never been eager about it, 'cause it's really bulky compared to the old paper license, but it is an all in one document (the medical used to be a separate piece of paper), and it is absolute photo ID, which the old paper one was certainly not.
Following up on Pilot DAR's comment, the old licence was multiple pieces of paper, but at least you could keep it in your wallet. The ADB is too big,so I keep it in my headset case.
In a piece of bureaucratic stupidity or more probably, inter-departmental warfare, the radio licence (
Restricted Operator Certificate - Aeronautical) is a piece of paper, issued by a separate government department - Business and Industry - and thus is not included in the ADB, which is issued by Transport Canada.
I first became aware of this, when I tried to rent an aircraft and was not allowed to because I didn't have my ROC-A with me! It is now firmly stapled in my ADB.