I have used both Dr Guenst and Dr Hollinger and prefer Hollinger. He's a very nice doc with the right sight picture. His brother is a retired AA pilot who reminds him that pilots aren't looking for an internist but a piece of paper ;-) He does enough to keep it all legal but isn't trying to find problems that aren't there. He plans to move out of his practice within the next year or two and is working to build up his base of pilot clientele. Recommend.