Ask HN: Recommend automatic grammar editors?

I just started graduate school and have found that an enormous factor in my work is writing clearly. While I did decently in my writing classes in undergrad, I feel that I was able to hid behind obfuscated ideas and complicated sentences. Now I actually want others to read and understand my work.

Peers and advisors are good resources, but they are very busy and often don't have the time to pick apart awkward sentences and deep stylistic issues. I am signed up for writing workshops, but I also want a more instant feedback system. Hence, I have been looking into automatic grammar/style editing software.

Current solutions I have looked into are: * Grammarly (http://www.grammarly.com/) * Whitesmoke (http://www.whitesmoke.com/)

Does anybody here have any familiarity with the above software or other recommendations?