I used textblobs to extract customer reviews from different domains like Amazon or Yelp in order improve my recommendation engine results with semantic information about customers' sentiments towards products they have reviewed before buying them! It's not easy at all using this tool but i managed it somehow by reading documentation carefully! The process of extracting user feedbacks was very slow due time consuming nature so you need lots patience when dealing whit these tools especially if u don't know how exactly what ur looking after doing your work!! Good luck guys!! Extracting product ratings form amazon/yelp etc..