Why write a review when I can quote one that says it all so much better?
"The entire film was a lazy, smirky reprise, an exercise in inertia intended to demonstrate that a master of deadpan such as director Jim Jarmusch could draw even less than the usual bare minimum out of Bill Murray, who seemed to be walk without using his legs, talk without using his lips, and sit like a receptacle that had been emptied an hour earlier."
That's from James Wolcott's blog (http://jameswolcott.com/). The only exception I'd take to that would be to note that Jarmusch's first two films (Stranger Than Paradise and Down By Law) were great largely due to his exceptional use of silence and emptiness. The problem is that deadpan is the only pan he's got. One more exception: the music of Mulatu Astatke, featured in the film, is great.