Yep, that about sums it up. I have only had a hospital birth, but from what I hear, if you think you are the type who would want a homebirth, you will not be as satisfied with a birth center birth.
For my 1st, I was going to a CNM-staffed center that was across the street from the hospital. The appointments were just like OB appts - the same tests, they all lasted 10 minutes, they recommend ultrasound, etc. They say they do not provide pain meds for birth but I didn't ask about other interventions. I moved out of town at 24 weeks, but I don't think I would have been satisfied going there.
What I really didn't like were the time limits. They say you cannot labor there for more than 24 hours; if you do so they ask you to go to a hotel until you are "farther along." They also say that you have to stay for a minimum of 6 hours after birth, but cannot stay more than 12 hours. I have checked with other centers, including freestanding midwife-run places, and they say the same thing.
I think the worst labor intervention ever is the clock...