Stands on the shoulders of the best scholarship through the centuries up to the end of the 19th. Collates the best exegetical comments and best applicational comments for every phrase of every Psalm. Exegetically superior to almost everything being produced today, theologically more reliable, and applicationally more helpful. If you could have just one thing on the Psalms, Plumer surpasses even Spurgeon. But why would you just have one, when you could have both?