I took a lesson with Daniel Donato today. What a nice guy. Very down to earth, patient, easy to understand; just a great all around teacher. He gave me a ton of ideas to work on, explained his approach to pentatonics, exercises to help with speed (at my request), interesting discussion of double stops. I booked two more lessons with him, one a month. If you're looking for a teacher or a tune-up, I highly recommend him.