Sentiment analysis

Find at least three online demos of Sentiment Analysis software.

Find at least three different movie reviews where the user also includes a score.  For example customer movie reviews on Amazon and Netflix use a 5 star rating system.  Copy and paste the text into the sentiment analysis demonstration software and compare the Positive/Negitive score from the sentiment analysis with the customer's star rating.

• In your post give an evaluation of each of the sentiment analysis applications.
• In your opinion, which of the applications that you tested was the most accurate?
• What are the limitations of sentiment analysis applications?
• Given an example of how a company can use sentiment analysis.