This is an incredibly well-thought out and robust plugin.
I run a site with links to over a thousand outside resources. Naturally, as partners revamp their sites, they can break dozens of links at a time with no thought about those of us who must update our links. Broken Link Checker makes this unnerving job much more manageable.
Today I stopped my work just to come here and write this review. I was just wowed by the realization that Broken Link Checker automatically fixes all instances of a broken link on your site when you update one in the backend. Really really impressive!