The good
• Edward Snowden endorses NoScript as a countermeasure against mass state surveillance he exposed. Read more at http://securitywatch.pcmag.com/security/321511-snowden-to-sxsw-here-s-how-to-keep-the-nsa-out-of-your-stuff

and

http://blogs.computerworld.com/encryption/23638/snowden-sxsw-we-need-better-encryption-save-us-surveillance-state

• NoScript allows you to permit which sites and add-ons you really trust to run scripts or track you
• Easier to detect and remove adware
• Also works as ads blocker
• Often significantly speeds up page load and save computer resources. Because unwanted scripts are block. Thus they don't need to load and run.
• NoScript is owned, developed, and supported by a friendly community

The bad
• Initial learning curve. But pass that it is easy to use.