I enjoy FanStory. It provides poets, short story writers and writers of novels a place to get feedback for what they write. I find the site to be very easy to use. The support staff very helpful and friendly. It's easy to understand how to post your work and get feedback. I enjoy the daily writing prompt challenges. Each day they challenge me to write something different. The people that participate are primarily adult writers that write for enjoyment. Some are looking to be published (and many have). The site does a great job of helping author's improve. Try it - you won't be disappointed.