Worth using, but it can be annoying.
Works 90% of the time but when it breaks it breaks hard. Wouldn't be as much of a problem if it the tools it provides you for custom changes were meaningful.

Great! Very useful

It works excellent!

broke almost all the basic pages. not worth it

Worked almost fine for me... But somehow I prevented some Pages to load the Login windows (iframes?)
even whitelist the website did not help. That's why I had to remove this extenstion. Everything else worked fine, but the block me from using my mails made it unusable.

Does what it says and does it well.