Critique groups, in person or online, are invaluable. They give you another view of your story and can find problems you wouldn’t have thought of. They also prepare you for facing an editor. They are not perfect, though. Members of your group can only tell you what they would do with the story if it were theirs. You have to remember that it isn’t theirs. It is yours. Here’s an interesting little essay on the topic from Alayne Kay Christian.