All parts and materials seem high quality finish. The shoulder is fairly easy to mount and removable. The main compartment is first protected by a zuziehbaren substance that repels water, before the solid lid is closed it. The cover can be optionally completely folded (buckle) or you open only the center part of the cover (zip). In the second case to reach the main compartment and integrated in the lid compartment, the complete folding up and the front compartment. The two side pockets are anyway always available. The zipper is likely to constitute a shortcut from the product description, because this just is not the entire lid is opened.
In practice I have not tested the bag. The other reviews I gather, however, that it is comfortable to wear despite the comparatively high weight even on longer trips. In this respect, I am completely satisfied and would far as any time to recommend the pocket.
Update 27.7.2012: In the meantime I use the bag whenever no backpack needs. The DSLR with lens and either a second objective or my small analog fit (small lens) pure. The weight can be felt almost on his shoulder. The camera is always close at hand and otherwise protected from bumps and weather. Wear shows itself so far none. I would buy the bag continues to be at any time.