I really find it annoying when I see, "he's not fast enough" or whining about it taking a week to get in. He has a tremendous reputation and he's an honest mechanic, of course he's busy.
I've been bringing my cars to him for years now. I found him in the first place, because he came highly recommended by two of my co-workers who have used him exclusively for years.
After years of going to him for everything, I've NEVER had a problem with my repairs. He's exceptional, honest and doesn't price gouge you. He won't add-on repairs that aren't necessary like many other mechanics do, he tells you what is wrong, what could cause a problem down the road and what he can do etc. I've never had a problem with something that should have been fixed, not being fixed and in an emergency - I always get in. As far as other maint, you have to make appointments with every other professional in your life, what makes you think you wouldn't have to with an honest mechanic with a great reputation? He's busy and booked up for a reason - he's GREAT!
I can't count how many bad repairs and even BAD oil changes I've rec'd prior to going to Holman's. I wouldn't trust any other mechanic with my family's vehicles. I can not praise this mechanic enough. He's a great person, he's straight-forward (he's not a "salesman", he's not going to schoomze you, maybe some people need that sort of treatment) and a pleasure to deal with.