I'm very fond of this design: it's both beautiful and fun to knit. At first I wasn't sure about the rib effect of the knit and purl lines, but now I think it enhances the shape of the leaves.
It makes the wrong-side rows less monotonous to knit too, since they don't consist of purl stitches only. (Which is what I often prefer since it requires less concentration, I should add.) I also think new leaves are incorporated into the design in an elegant way.