And for the ladies...I have tried many camera bags over the years and by far the best is the Cheeky Lime Classic

Bag,http://www.cheekylime.com/collections/all/products/cheeky-lime-classic-bag-green

This bag fits everything and looks gorgeous! Mine has held up for years of horse shows! And is so cute!! Thanks Cheeky Lime.
ps - the Cheeky Lime purse styled camera bags are not very nice - stay away from those

My very sweet sister gave me a real Gucci brand camera bag a couple years ago.. it is Gorgeous! But it is a constant worry that someone will try to steal it. (just for the bag itself! And then those creepers will also get my cameras!) So I don't use it very often.

Here is a tip for all camera people - Sometimes I have to do shoots in kinda sketchy neighborhoods (for little leagues, etc..) - In these cases I will put some gear in an old diaper bag; they are padded and have some useful pockets. Then throw in one diaper on the top...No one will touch it! NO ONE, especially some naughty teenagers looking to steal stuff - will touch a diaper bag! I can leave that thing on the stands for hours while I run around and shoot. But a nice bag that has CANON embroidered on it may be a bit tempting.

In my younger days I tried several bags that were not camera bags because they were cheaper.
Today I would never even think about it.
That bag looks completely un-configurable. I'm sure it does not have movable padded dividers inside and all those amo clip looking pockets all look the same size!
Does everything on the inside have to have its own separate case for padding?
For me, I found years ago that a shoulder bag just doesn't do it.
If they are loaded down and heavy, after 8 hours your body is thrashed from having all the weight on one shoulder and there is no way to keep a shoulder bag from swinging around. Scrambling up a steep almost cliff, like you find at the ocean or climbing into a tree to get a good vantage point are pretty hard with a bag that's swinging all around.
Maybe for the most sedate type of shooting or driving up in a car and carrying to a shooting sight.
If you a very active type of shooter pretty much only a backpack will work, as a backpack can be completely imobilized and the weight supported by the entire body leaving the hands completely free for working.
A shoulder bag for me has its place, but not enough so that I ever use one even though I own 3 of them.
Sometimes when shooting something like a birthday party for family or friends I use a small shoulder bag that fits only my dslr with short zoom and one extra card.
That tactic-bag looks to me like it's designed to be taken to a location and then set down there, not for carrying around.
Setting a bag down can be a dangerous practice theft wise, not to mention that you and your gear are NOT together when you need something. Just saying!! ;-)
SS

I have been using a Think Tank sling bag for several years. It holds my D4 with 24-70, a 70-200, a 105 Micro, spare battery and cards, 2 speedlights. It has a pocket for a laptop and another pocket for paperwork (and I store AA batteries in that for the speedlights). The strap goes over one shoulder and it hangs on your back. You can pull it around so it hangs in front of you, at which point the top of the bag is a horizontal surface that you can lean your elbows on (if the strap is adjusted for the right height). You can use it for a writing surface, but it's soft so you want something firmer to put under the paper. When the bag is in front of you and open it's easy to put and take things in and out and it provides a place for things to fall into if you are fumbling around changing lenses or filters. There's a strap underneath to hold a tripod (but I've never tried that). I store the gear in it so I include a dessicant canister. The interior is configurable with velcro-attached dividers.

Some people don't like photos added to their posts without permission, so I'll just provide links. The photos are taken with a D800 so they're about 12-13 MBytes each. For scale, the pattern on the linoleum is 8-3/4 inches square.

http://small-farm.org/images/Bag%2020151114%20002CC15.jpg
http://small-farm.org/images/Bag%2020151114%20003CC15.jpg
http://small-farm.org/images/Bag%2020151114%20004CC15.jpg