I've found these messages to be great! Very sobering and uplifting; God is magnified.
The teacher is Brent Bradley, pastor of a PCA Presbyterian church in Kingsport, TN. I was privileged to be able borrow a bunch of tapes of great messages preached there. These 5 messages preached from Psalm 109 were a very small subset of the whole collection,
Here are the links to the 5 messages. Each message runs 45 minutes or less. A song and benediction at the end of each have been left in for optional edification.