I've been in to see Dr. Newton once, and I've called the office a handful of times. So far, they've been very responsive, answered the phone promptly, and been courteous. They were also quick to call with any lab results. My appointment was easy and painless. Dr. Newton is friendly, efficient, and just gets to the point. It's also been really easy getting prescription renewals from them. I have no complaints!
One thing to note is that they do NOT accept credit cards for co-payments so you'll have to bring cash or a checkbook if your insurance doesn't cover your exams. I'm not counting this against them though because I don't have a co-payment on my insurance.