I have asked for brutally honest critiques before. And yes, they have helped quite a bit. This wasn't on the writing side, but the Post side. I think it helped shore up my Doc quite well.
Be prepared for another critique request, coming up soon!!
Honestly, I don't think I would have completed my first draft had it not been for the valuable feedback I received from the members here. I am currently starting on my first revision with the aid of Filmy's revolutionary 4-act structure as a guide.