I followed this guide by Mark Goodyear to try Gulp (a Grunt competitor) out. I don't use either of them at a level where I'm qualified to have a strong opinion about betterness. They both work for me. I do enjoy the piping in Gulp how you say "take this, do this, this, and this, then put it here" - rather than configuring a source and destination on each thing like in Grunt.
One hiccup I faced: I was running Node 0.8 something locally, which was too old for Gulp. Might as well get yourself upgrade to 0.10 something.