As a Chartered Engineer with 35 years behind me, I chose the Mezzo D9 as my folder since it does not have a hinge in the middle of the main strut /beam / tube.
It is my first folder but after reading the reviews I was convinced it would be good and I am not disappointed
. My engineering work colleagues are also impressed with it.
Now ORI Bikes are the supplier of these ...
http://www.oribikes.com/product_detail.php?cID=1&Key=18