People praise It's use In both the Linux world and the Windows world, Personally I never bothered with It.
The guy who maintains No Script pulled some shady nonsense in the past with his add-on secretly creating filter exceptions in Adblock Plus so the ads on his site would show up. He's apologized and promised not to do it again, but some people might not want to trust someone who has shown such profoundly bad judgement in the past.
Here's a random article on the subject:
http://www.computerbob.com/wp/noscript-controversy.php
If life gives you lemons, make lemonade.
