They very good, sometimes. I know nothing about Zacks, but I do the Motley Fool and I think they're pretty good although I've moved away from trying to pick specific stocks. I don't have time for that, I'll never become an expert, so I prefer mutual funds with good track records with good managers who stay true to their discipline. For example, I don't want to own an emerging growth fund that's invests in fortune 500 companies (overly simplistic example by design)
I used to subscribe to a news letter 30 or so years ago called something like "The Contrarian" and they were really good. I wish I still owned every stock I ever purchased, never sold one, I'd be so far ahead of the game. I've seen real wealth, I network with estate attorneys that have seen real wealth, and none of those real wealthy people were traders. They all buy and hold, without one exception.