Quick thoughts on a grammar checker

So I’ve heard about several online grammar checkers. While I will probably check out the most popular once I have enough material to pass through it; I get the feeling that the cheapest / most accurate way to fix grammar is simply to learn and employ it. Knowing specific cares of where to put a comma, where to use specific verbiage, subject / POV slips, etc are key to determining proper grammar.

Again, I have yet to use these checkers, and will try them out in the future, I just don’t have a lot of faith in them at the moment.