Now I let myself but on a non-leather alternative, and have not looked back.
The bag is very well made, flexible in size / depth, yet easy (the laptop and, if a folder is hard enough) and offers plenty of storage space in a wide variety of separately sealable bags. Only my big "pins collection" meets with 3 pen slots available on borders.
Now I have much more storage space than before. After I've given my usual stuff, I was amazed that I actually without squeezing and pressing one more wide DIN A4 folder into getting in the sum earmarked for a folder compartment and the bag went without problem.
Can I therefore recommend it.