Opinions on Advanced 4wheel drive systems?

[goin camping]

Spotted a 1993 Ford van with a 7.3 in it. The conversion was done by Advanced 4wheel drive in Utah.

Does this company's conversions work well and are they reliable?

 

[cruiseroutfit]

Lots here:
http://www.expeditionportal.com/forum/threads/35166-Any-feedback-about-Advanced-4x4?

I'll repeat my comments, they are very well known in the western tourism and commercial 4x4 van world, i.e. Yellowstone, utility companies, ski-resorts, etc. They do dozens of van conversions each month and have been for 30 years now.