I'm using it on my current project and find it quite useful. The only thing which was bugging me is that I tend to use inline IE hacks in my css, like that
* cursor: hand;
And it seems like sass doesn't support such a feature, at least I haven't found it in their documentation.
But in reality it does actually has support of the feature, just it is not documented. It looks like that
Note, there should be no space betwen '*' sign and the property name