Well, before I write this, I'm gonna say the famous words my son used to use on me when he was a teenager......"Quit judgin me, eh!"
I got no love for canvas packs, other than the old timey nostalgia stuff. Our school club had canvas packs for years, and the amount of time spent repairing them was pretty substantial. Plus the waterproofing of the time, three heavy duty garbage bags, seemed to be a guarantee that kids would not only get everything wet by the second day, but also loose several things between the layers of garbage bags. When I first found the seal line packs, I thought they were the cat's arse, until I discovered that their lifetime was fairly limited too. I had bought about ten of them, from different makers, sealine, eureka, and they all developed holes or broken straps within a few years. The holes on the rubber packs were fixable, but once the straps went, they were useless.
Enter the barrel.....what a hardy piece of gear! Despite every attempt the kids could use to destroy them, they persevered. The biggest problem I had was when they mysteriously disappeared from my shop, stolen by wayward staff members. I have had all kinds of harnesses, from cheap to expensive. The cheap ones sometimes broke, but the webbing was very easy to repair. Kids could now keep sleeping bags and clothes dry for more than a couple of days!
As far as carrying them, I found them to be pretty superior, especially for double banging it....I could sling the second barrel horizontally on top of the first barrel and cruise. I've never found them to be uncomfortable, after all, it's just a portage, not a backpacking trip.
I mean look at these happy kids!