Fantastic in theory, and often in use, BUT one major issue for me. It takes time to allow each part of each site that you "trust". When your work requires you to interact with a lot of web sites, that adds up. All good, EXCEPT that on a regular basis, NoScript simply "loses" those entries. My sites stop working, and I have to go in a do it again for each. Remember too that it's not a matter of "trust this site", as a great many have good and bad mixed together. I personally go to at least dozens of sites that involve 5-15 different scripting sites, and have to sort out on each which are good and which are necessary to get the data I need. So it's a lot of work, but worth it, as long as my work isn't randomly discarded. Fix this, it's 5 stars. With the problem, it's closer to a "necessary evil".