Took lessons from David Knorr before Hurricane Katrina. He was an amazing instructor. It was always a positive learning environment and he was always generous with his knowledge. He would even transcribe songs for me that were too difficult to learn by ear at the time! Im considering taking lessons again. If I ever did, Id take them from him. Overall, I would say that the lessons were worth every penny.
I take lessons here and I get a lot of information and tips from taking lessons. David is a very knowledgeable guitar player, he knows a lot of theory.