We tried dealing with them for an Alto trailer to use with our Roadtrek for extra space during longer stays. Between a less than stellar dealer and Safari Condo's poor communication and inflexibility, we spent over a year, only to find out that it would cost 30% more than we were initially indicated. Statements like, "yes, we can leave out the propane system for you" really mean, "we will leave out the propane system, but you still have to pay for it". We didn't find that out until we were nearly ready to order. By the time we got it home to Minnesota, it would have been $40K for a tiny trailer, and we would still have had to upgrade some of the systems to what we wanted.
At least in the Alto, which is a very expensive little trailer, the components are only OK. Single stage converter, low end solar controller, etc. I assume the vans are similarly equipped.
I think the last I read on their old website, just saw the new one, you have to furnish them a US standard van for them to convert if you are from the US.
All in all, we like their products, and the way they do things, but they were very expensive and hard to deal with, so we will look elsewhere.