Brilliant. Very useful. Odd that it doesn't exist by default in WP

Having this little plugin add the classname field gives one a huge amount of fine control of the details of a page layout.

It is such a basic requirement that anyone who builds sites on a regular basis needs to have a simple class to hook onto widgets, and this is even more the case now that responsive design has become so important.

Who wants a ton of sidebar widgets stacking down on a small screen at the bottom?

We might want to show only the really important stuff to mobiles and save on screen real estate, so what better way than to use a media query to hide some sidebar items on narrow screens?

I love this plugin, so simple, incredibly useful!