I own an XX, but it is a very early prototype. I also own a bunch of others models, various brands and sail configurations and live to compare kites.
first problem? Severe oversteer, you release the steering wheel and the vehicle goes wildly off the road instantly,... I hate that! If you want to turn in the center of the sail, this model is fun, if you want wingtip turns keep away.
secondly, it is way too heavy for a low wind kite, it flies but graceful like a cattle truck,... heyitprobably survives your learning crashes though
third, none of the framing members in my possession fit this model,
fourth, you will be the only XX owner in your kite club,... is that good?
i would sell mine, but everyone I know is too smart locally, can't give it away either as it was a trade for flawed diamond tubes custom ordered for the Zen,... rather than "make it right" (they were too long) Rev sent the XX instead. That action ended a 25 year relationship good for a thousand dollars each season, not thru retailers direct from the factory!