Great site for free editing and critique

I recently discovered a great site for free feedback on your writing. It's:
Mywriterscircle.com.  I put up the first chapter of my new sci/fi novel
INSECTLAND and already have more than 60 views and ten comments on improvement.
Wow. The only catch is that you have to read and comment on others writing. But
hey, there's no longer a need to pay hundreds if not thousands of dollars for
editing when you can get it free!! These writers on the site are good, too. The
feedback I've gotten already is making the novel better. Seriously, check it
out.