I hired him to inspect a property based on a brief interview and all the top reviews on Yelp. I'm glad I did.
It took two hours to inspect the house we intended to buy, and then he gave us a complete presentation (including pictures) to us and our RE agent on-site. His written reports were in our email within another couple of hours.
He is competent, thorough, and a really nice guy to deal with. I can't recommend Don Porter highly enough.