One of my standard summer brews is a clone(ish) of Monteith's Summer Ale (NZ). It's brewed with ginger, Rata honey and Riwaka hops. I splurged and ordered the honey and hops from NZ (NOT cheap). To be honest, the aroma and flavor of the Riwaka were very subtle. The best description i can come up with is a muted combination of cascade and citra. Of course, it was also in a brew with ginger so it was hard to separate the flavors. I still have some in my freezer and plan to do a pale ale or maybe even an IPL on the hoppier side to get a better feel. In general, though, I would recommend using it as the sole aroma hop (late addition) and dry hop so the flavor/aroma doesn't get masked by another hop. Use an early CTZ hop addition for your primary bittering hop.
I'll be curious to see your take on this.