When comparing Kata - 3N1-25 PL Sling Backpack vs Peak Design Everyday Backpack, the Slant community recommends Peak Design Everyday Backpack for most people. In the question“What is the best replacement for the discontinued Crumpler Big Belly backpack?” Peak Design Everyday Backpack is ranked 4th while Kata - 3N1-25 PL Sling Backpack is ranked 5th. The most important reason people chose Peak Design Everyday Backpack is:
Side access theoretically makes accessing items in the main compartment easier.
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Pros
Pro Easy access with quick draw
This bag offers a quick way to get to ones equipment one handed with it's "quick draw" one hand pull buckle.
Pro Does not turn into a black hole
Side access theoretically makes accessing items in the main compartment easier.
Pro Lots of options for external carry
Many hidden straps and ways to mount stuff to carry extra stuff.
Pro Separate laptop opening
Unfortunately not secure like the Big Belly.
Cons
Con Does not appear to have space for a normal laptop
From the description the best it can do is a netbook or iPad. Definitely a dedicated photography bag.