I hope we can each agree this sentence is Completely wrong since "very good" is definitely an adjective, and can't be the subject of "is". A similar is legitimate after you put "the best" in that place. It's easy to argue that "the best" could be accurate as the subject https://en-web-directory.com/listings13272363/the-ultimate-guide-to-cardiology-services-and-testing-in-ocean-county-nj