Young Adult Fiction for Adults discussion

Copyeditors are invaluable. No question. For convenience and economics, I'd love to invest in proofreading software. Just don't know if it does the job. My typos are plentiful, especially missing words.

Anyone have any experience to share?

AVAILABLE PROOFREADING SOFTWARE. $ VARIES.
http://www.editorsoftware.com/
http://www.whitesmoke.com/
http://www.serenity-software.com/
http://www.grammarly.com/
http://www.intelligentediting.com/
http://www.gingersoftware.com/proofre...
http://www.mywritertools.com/

I have a writer friend that uses grammarly, she likes it a lot, she showed me a report from grammarly on something I had written, I think it is good, but I dont know if it is better or worse than the others.