Posted 05.08.2013 @ 10.51AM
I use Less daily. It definitely saves time and also offers several benefits over writing pure CSS such as:
Inline expressions - width: 36*21px;
Colour methods - background: lighten(#f8a9ca, 10%);
Variables - color: @my_text_colour;
This combined with the fact that you can nest your style declarations inside each other makes it super powerful.
We use Grunt to build less files into css files automatically whenever a less file changes which makes it a breeze to use.