I been to a couple of their competitions just to have a look and it certainly looks good fun. let me know how your training day goes as i really want to have a go but missed out on training in july. Which jumpcross are you going too? I have only been to Grange farm (the HQ) and i have to say that everyone seems to have fun no matter what level they are competing at.
I have competed in a jump-x earlier this year. It was just show jumps on a pathway in a new forest development. It was great fun though and I did it with a friend in the pairs class. It took us just under 4 mins and we got 3rd. There is another one soon. The highest class was 2`6".