Well, not every installer is a high school drop out. My installer was a licensed electrician, which is required for all installers with my company, and did a very good job.
Like I said, I'm sure there are some good companies out there. Perhaps my advice should have been to make sure you check out the folks who will install your system if you choose that route. It's like car salesman, there are good ones but the bad ones keep screwing it up for the good,honest folks.