I haven't been trying to clone it, but I have been trying to imitate how they get the hop flavor. It is really unique. I get a little fruit/tropical flavor on the front end of the sip, but when I swallow I get the herbal/spicy taste.
I have the grain bill down pretty well (pretty easy), but I just can't get the hops right.
I'm on my 10th try right now. All of the beers I've made have turned out to be very good IPAs, but I haven't made "the one".
Next batch I'm cutting down on the Citra/El Dorado to 1/2 ounce and doubling the Sterling/Crystal. Hoping to nail it this time.