Dr. Sailer and his staff have taken care of me since I moved to Tucson ten years ago. The office is peaceful; the equipment is moderrn, and the staff are all caring and professional.
I've had regular cleanings and exams there. The cleanings are thorough: they take an hour (unlike another dentist I had once who did it in ten minutes). Dr. Sailer has fixed a few cavities and crowns. He's also worked on my teeth to make the bite more perfect and the spacing between them uniform (so I can floss more easily). He's always going to or giving education seminars, and he goes to Honduras once a year to do charity dental work. He even throws an annual Cinco de Mayo party for all of his clients.
The only downsides are his fairly high prices (though you get what you pay for, I think!) and that he's had a lot of staff turnover in the past few years. When I started, I always had the same hygenist; now, every time I come in it's someone different.