A magisterial, thorough, scholarly mid 20th century Evangelical commentary on the letter to the Hebrews.
The author provides a thorough introduction. For every section of the text he provides a translation with copious notes detailing the critical textual issues involved with every major variant. His interpretations are thorough and engage on every matter of discussion and dispute which will likely come up.
I understand the impetus to update the NICNT with the Cockerill edition, and have not read that volume, but even though Bruce's tome is over 60 years old, it holds up strongly, indicating the quality of the work. He provides a great snapshot of the conversation regarding the text and its interpretation in the middle of the twentieth century, and that conversation remains relevant to this day. Other commentaries will update the conversation, but Bruce provides a great foundation.
Very much worth the reading when deeply studying Hebrews.