With one look at the 3N1-33, you'll know that it's a very different pack. There are an interesting arrangement of straps, hooks, and pads in which to conceal those straps on the rear. Kata thankfully includes a small booklet which describes the many ways this pack can be worn. We particularly enjoyed two of them. Wearing it as a standard backpack was extremely comfortable. There's a sufficient amount of padding on the rear, and adjusting the straps to bring it closer to your frame is a cinch. The torso / sling approach is quite useful as well. This combines the flexibility of a messenger bar hold with the stability of a backpack hold. You only use a single strap in torso mode, but the pack remains upright on your back; when you want, you simply slide the pack around in front of your stomach, and the side compartment is right there for easy access. Left and right side compartments are here to support left- and right-handed shooters.

Internally, there's tons of room, and it's all well arranged. You can easily fit a flash along with two to three lenses on each side compartment, along with three to four more in the center. Accessing those requires the bottom to be unzipped, but it's not a hassle. There's also a separate and dedicated top portion; we love the compartments here. Keeping things separate ensures that items don't slide into a section as you're shooting, and this approach worked very well for us in the field.

There are two side pockets along the top edge that are separated from the core of the bag; these work very well for holding lens caps, keys, wallets, cellphones, business cards, etc. Of course, the padded laptop sleeve is its own compartment as well, and held our 15-inch MacBook Pro snugly and without issue. You can squeeze two in there back-to-back, but it's really tight.

Overall, the attention to detail here is just impossible to ignore. The pack is rigid from top to bottom, and it's almost impossible to knock over. The padded compartments are all easy to access, and we truly felt as if our lenses and peripherals were in good hands within the pack. The ability to wear this in so many different ways gives the 3N1-33 a huge leg-up over the competition, and while it's compact enough to slide beneath the average airline seat, it's able to hold quite a load due to it not slimming from bottom to top as most traditional backpacks do.

Just to give you an idea of what will fit in here with ease: a 15-inch laptop, power adapter, 2.5-inch external hard drive, seven USB / connector cables, a Nikon D3s DSLR, 70-200mm f/2.8 lens, 50mm f/1.4 lens, 60mm f/2.8 macro lens, an included Kata rain bag (to protect the entire pack if it starts raining), a bulky D3s charger, two Lensbaby creative lenses, an SB-700 flash, car keys, a stack of business cards, a smartphone and at least two more medium-sized lenses if I wanted. All of this fits in with ease, and while you'll need a strong back to load it around, the Kata remains comfortable for hours on end, particularly when you can change how you carry it every half hour by just swapping a few clips and redistributing the weight.

This particular Kata has earned our highest recommendations, and that's saying something. The only people who may not be fond of this bag are those who routinely carry very small camera setups. This is a bag intended for professionals or enthusiasts that enjoy carrying around a robust lens collection and loads of accessories. Kata makes a few smaller versions of this very pack that still maintain the multiple carrying options, so we'd recommend having a look at those (3N1-10, 3N1-11, 3N1-20, 3N1-22 and 3N1-30) if you need something that's more compact.

At around $130, the 3N1-33 isn't cheap, but it's a good value for what you get. Packs are easy to find, even cheap ones. But good packs are hard to come by, and you definitely pay a premium for good design, rigidity, stability and flexibility. This particular bag is also fantastic for traveling; the dedicated laptop compartment as well as the standalone top compartment help to keep things moving when rolling through airport security. Rather than having to dig into multiple places and under mounds of accessories to get your laptop and Bag 'O Liquids out, you can keep them in their own sections for easy access. For the hardcore travel warriors, there's even an optional wheel attachment that'll allow you to roll this bag from gate-to-gate. Our advice here is to skip that and invest in a rugged roll-aboard while keeping this on your back.

If we had any complaints at all (more like recommendations for the next revision), we'd say that there's a need for a dedicated zippered window on the front compartment, so you don't have to unzip around the entire bottom just to access some of your lenses that are stored more towards the center of the pack. And while the zippers were as rugged as they come, we'd prefer the yellow found in the interior to be pulled over to those zipper pulls. When you're shooting a dark reception, having well-lit zipper pulls makes accessing your gear a lot easier. Other than that, we can't really find anything to nitpick, but we definitely see a need for an even larger version to house 17-inch laptops and even bigger lens collections.