Pros
I agree with the other reviewer, you can get some good experience if you're proactive and ask to work on stuff. Everyone who works here is great.
Cons
There isn't a defined internship program here, so the majority of your time will be spent doing absolutely nothing. You'll answer the phone all day, and half the time it'll be a wrong number looking for a doctor's office. If you work hard and make yourself stand out, the owner will place more responsibility on you. You do not want this. That extra responsibility will have little to nothing to do with your internship, and you'll be expected to be available even when you aren't scheduled to work. Overall it's a nice resume builder, but find a different internship if you can.