The Andar Addison Backpack is my go-to slim leather backpack when I need a personal/work bag that can actually fit my 15-inch MacBook Pro. I love the big front bucket pocket for quick-grab items and the hidden side zipper pocket that runs across the bag for my phone and wallet—easy for me, not easy for everyone else.
Pros
+Fits a 15-inch MacBook Pro (hard to find in a slim backpack)
+Full grain, oil-waxed leather with a high-quality feel
+Hidden side zipper pocket is roomy and secure for phone/wallet
+Front bucket pocket holds a lot without bulging out
+Comfortable backpack straps plus a grab handle for easy carrying
Cons
-15-inch MacBook Pro fit is snug along the edge, so I don’t like to overstuff it when the laptop is inside
-Interior slit pockets are on the smaller side for only a few small items