I had the first (sucessful) go with the kitewing & dirtsurfer combination inland. The wind was blowing 15mph and although it was raining I decided a quick trip up onto cleeve hill was called for. As it's only 2 miles from my house, its not a bad venue, and one I should use more often. Its right on top of the hill, and if its windy anywhere round here, its the place to be. Normally you expect to see a few kiters there. However, probably because of the rain, it was just me and a few dog walkers.
Because of the higher rolling resistance starting, and the generally bumpy surface, its harder to start than on a beach. Once going though, relatively easy, and because of the wheel diameter, much easier than an ATB. Try and avoid the really ruff stuff, but otherwise quite good, and quite fun if you start to pick out the "interesting" terrain.
I managed a few runs up a hill, but hard work in the gusts as it was downwind and more sheltered. Big wind shadows behind the gorse bushes, and nearly bailed out when I was riding between two big bushes.
Top speed reached, 21mph, but didnt really go for it as the conditions were not perfect. (wet and muddy). Kited about 6 miles. Brake seemed OK.
Highlights
Nothing new learned, except uphill riding, but worth doing a few more trips up there after work (if its 12mph+), now the nights are getting longer.