My company uses this and I write a lot of the front end web stuff.  Personally, I can tell you that this is not that much better than plain css.  It's great to have variables and what not, but the I think the biggest change is that you'll notice that you do more things like:<p>"+standard_padding"<p>Instead of adding what you would in css.  The stuff I do with it is not perfect, but I was super jazzed about it at first, now, I don't really care either way.  Sometimes it helps and sometimes it hurts.  It's not really revolutionary.  People who don't spend a lot of time doing front end html/css stuff or don't really understand how to write a good stylesheet will probably like sass more, it just shifts your thinking a little bit.