When comparing Kata - 3N1-25 PL Sling Backpack vs Crumpler "Rampaging Mob" M/L, the Slant community recommends Crumpler "Rampaging Mob" M/L for most people. In the question“What is the best replacement for the discontinued Crumpler Big Belly backpack?” Crumpler "Rampaging Mob" M/L is ranked 1st while Kata - 3N1-25 PL Sling Backpack is ranked 5th. The most important reason people chose Crumpler "Rampaging Mob" M/L is:
Rather than the shoulder straps only being stitched on to the pack, they are connected with the same piece of fabric used on the back of the pack. This adds strength/durability to the shoulder straps.
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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 Straps integrate into the bag structure for strength
Rather than the shoulder straps only being stitched on to the pack, they are connected with the same piece of fabric used on the back of the pack. This adds strength/durability to the shoulder straps.
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.
Con May not be available everywhere
www.crumpler.eu doesn't list it, and it does not appear in the usual suspects (i.e. Amazon). It might need to be ordered from Australia and shipped.
Con Laptop compartment is not seperate from main compartment
In the Big Belly the laptop compartment cannot be opened whilst worn, protecting the laptop to a degree.