wow its that bad eh? i haven't seen any review on them.
but back to the original poster, if you have the new Dahons (which you do from your other posts!) I think the landing gear would be a better solution because it's small and more out of the way. Also that mo rack is like $255 SGD! while the landing gear i saw it go for $35 AUS on a website. I just find all those wheels on top and having to pull it down feels clunky vs the clean tiny landing gear that you just flick and go.
http://www.pushys.com.au/dahon-landing-gear.html
If you owned a Tern I would also choose the trolley rack first. Thor sells them bloody cheap!
http://www.thorusa.com/accessories/racks.htm, plus it has no moving parts and a integrating cover system is quite a nice setup there.
In the end I find the mo rack would be marketed to more of the other 20 inch folding bike brands since Dahon and Tern has some pretty dang good solutions of their own.