5. The method of claim 1 , wherein providing the at least one visualization comprises providing a comment sequence track having graphical elements representing different comments in the user feedback, wherein a particular one of the graphical elements has a first visual indicator representing a user sentiment in the corresponding comment, and has a second visual indicator representing a level of uncertainty of the user sentiment.
5. The method of claim 1 , wherein providing the at least one visualization comprises providing a comment sequence track having graphical elements representing different comments in the user feedback, wherein a particular one of the graphical elements has a first visual indicator representing a user sentiment in the corresponding comment, and has a second visual indicator representing a level of uncertainty of the user sentiment. 6. The method of claim 5 , wherein the first visual indicator of the particular graphical element is one of plural different colors that represent different user sentiments.