Front pocket: Here my iPad2 fits easily into the patch pocket. Very convenient and the small separate pocket for the whole cable odds and ends. The key fob makes sure that my keyring does not disappear with plant identification in the depths of the backpack. Medium bag: The Notebook (15.6) is well protected in the notebook bag, because even still fits a larger notebook pure. Rear pocket: Lots of storage space for all kinds of things, no unnecessary bells and whistles of the volume diminishes. Below the raincover bulges a little, but is also at the same time a good protection, if you put the backpack sometimes hard to the ground. Have the same time tested Extreme Operation: iPad, notebook, CD bag, some power supplies and two large external hard drives I could stow away easily. Nevertheless, the comfort was still intact! The most important criterion was the integrated rain cover, which also protects in a real rain for me. Conclusion: Can I fully recommend.