It looks interesting but I couldn't tell what the specific suspension design was. You really want an independant suspension if possible. The other challenge I found when looking at off road camping trailers from South Africa or Austrailia was the 240V electrical systems. Significant redesign and fitting is required to switch to the US 110V system.
The two companies I found that have taken care of that challenge and are importing US version are Safari Trailers and King Kampers.
http://www.safaritrailers.com/index.cfm?action=catalog&catID=1
http://www.kingkampers.com/kamper/overview.html
I personaly own one of the King Kamper trailers and love it. One other advantage of these trailers is that they close up to a low profile with less wind drag than the one you linked to. Check em out and see what you think.
I have a lot more info and pictures of the King kamper if you are interested.
Just my two cents worth.