Addendum July 2014: After I had fallen ziemliech with another foldable roof box, but we have bought at the end of the Thule Ranger 90. We did not regret it. The roof box can be set up very easily and secure it with the quick release without any problems at the carrier. I was initially skeptical about whether that is stable enough, but it holds bombproof. The luggage can be fixed well to the inner belts and the entire box is additionally reinforced by the outer belts, so that really nothing is flapping even at 130 km / h, otherwise no significant noise.
The outer material is very smooth, so that the necessarily glued dead flies could be washed off easily. The bag for the roof box is dimensioned so that one can easily pack the box after use. I am often concerned at the phenomenon that factory packaging were so tight that you could pack the products only with great effort again later. Here everything is right.
The zipper can be locked with a padlock. Whether the thieves but not discourage easily at bay with a pocket knife to the back of the roof box, may be doubted. The castle is a nice but useless accessory.
The only downside, of Thule but can not be counted as a defect, is in fact that you just do not even on the fast what reintun or may rausholen as fixed roof boxes. Here things come in that are no longer needed to arrival.
Because of the very good impression I have increased my star to five.