Fred is my trumpet teacher & has been teaching brass (trombone,trumpet,french horn,tuba) for more than 40 years. He's great with fundamentals, teaching you the details of physical technique, so you don't start with bad or even physically dangerous habits. But he's also the teacher of many people who are now professionals (people in the Philharmonic, or composers, or really good hobbists, etc). My trumpet lessons go like this... I play trumpet, he's on either valve or slide tombone. He tells me stories of his old friends, jokes, thoughts, famous or just really interesting people he's known, stories of humanity in between excercises when your chops need to rest. "I'm a great teacher," he says really without boasting, "because I had a great teacher", "the late John Clark"... not to mention all the gigs, his years teaching at Manhattan School of Music, with the Goldman Band, and the Metropolitan Opera, among other things. I love Fred because he's a wonderful person. I'm glad also he's a great teacher.
He's got a focus on all the fundamentals of music. If you're interested in Jazz in particular, he might not teach with the latest techniques. I would think, especially great for a beginner, or a coach if you're already good & just need polishing technique.