Notably the Fuji GX680 per Wikepedia weights around 4kg... Dang, that is a heavy studio camera to carry in mere shoulder bags...
Any reports of photographers purchasing these bags and filing law suit for back pains?
Personally I use Tenba PBP per recommendation ca. 2002 of a photographer on Nikoninans. Sure many said Tamrac and Lowepro, but this one gent said his Tenba was the best piece of photographic equipment he had used and had been with him on many international travels. I now witness the precise same, it is the best piece of photographic gear I use and has helped me carry gear with comfort and trips worldwide, including a round the world journey. I tested out high end Tamrac backpack in shop at time by test loading it, and what a difference, with Tenba I could carry much more weight and more in comfort. I used to have back pain when younger, but over ten years none due to carrying camera gear, thanks to my Tenba. 
Look he does it on Vimeo as well --- It seems as false marketing. 
What do you mean by he does it on vimeo?

You make it sound like I'm posting the video left right and center. For your information I'm not, it was posted by Tamrac.
Also I don't see why you are accusing me of false marketing. Exactly what claims am I making in the video? Seems to me that all I'm saying is that I happened to choose a Tamrac back in the day and had them for 10 years or so. I also say that if I go back to get another I would get a Tamrac. It's actually quite a logical choice because I have a few Tamracs and it's really handy to stay with the same ones because the inside dividers are more interchangeable than mixing brands.
Do I at any point in the video say that the Tamrac bags are superior to any thing else?.... NO.
Do I make medical claims? NO.
Did I make any claims that the Tamrac bag makes it easier to carry my Fuji's.... NO.
Did Tamrac pay me? No. However I did get a call a month or so later saying that they liked the video and asked me if I could use another bag.
I took up the offer and popped over to their show room in Chatsworth that's actually not far from my house in the Santa Monica mountains.
I have to say it was a real treat to spread my camera gear over the table and play with a bunch of bags..... sort of like a kid with wood blocks.
Well if you think that with that they bought me off your wrong..... While the free bag was a nice and both appreciated and welcomed gift it was about 1/4 of my rate in studio
for the extra time we took to do the video shots and interview.
Derek, the young still photographer and videographer that shot the video was very pleasant and it was a pleasure to facilitate his work.
What do I think about Tenba and Lowepro? I think they are excellent. Tamrac, Tenba and Lowepro.. all good stuff.
And for a full disclosure...
Oh and just in case it comes out in the future I also have an autographed tripod that was given to me by Lino Manfrotto as a souvenier after he invited me and
another photographer for a weekend to the mountains in Italy for some fine food and pick our brains and exchange ideas.
I was sponsored by Polaroid for many years... free 8x10 Polaroid film for any editorial I shot... and I shot many.
I did along with Donna Fashion magazine let polaroid use a photo I shot for the magazine for an ad in a pro photography magazine, in the same issue I was on the cover of.
If I recall correctly I made no technical claims in that add. Just my name and the photo I think.
I did a few lighting workshops (2 or 3) for Elinchrom and got a free flash tube from them when I broke one a few days after a demo.
let's see... did I miss anything??