I would get one of these if not for already having one and loving it. I bought mine for the features without knowing anything about the McKlein brand beforehand.
I've had it now for just over a year. As I said I bought it for the features, I'm keeping it as my regular bag (a feat, let me tell you, I have a pile of various brand and style laptop bags in the closet) for its durability, ease of use, utility, and overall design, not to mention the spot on aesthetic touches. I'd never thought I could look professional with a backpack, but it manages to do just that.
I say all this because I'm very abusive with my bags and this thing has held up far beyond what I ever expected. Books, laptop, tablet, mp3 player, gadgets, thumbdrives, hard drives, equipment, g2 pens, and all. It comes with more pockets than I've found uses for and everything is very much accessible even after stuffing it to the brim. I do not have to take everything out in order to get at what I need. This is indicative of a well thought out design.
I've yet to see a thread hang off the bag proper, or even any obvious or visible threads exposed to be frayed. The straps are the exception to the exposed thread rule but they are very heavy duty, stitching is doubled or tripled up. The junction between the leather/padding portion of the strap to the nylon belt webbing material (the type they use for seat belts) is accompanied by heavy rubberized bracing with firm stitching all around. The buckles and clasps are all metal and seem sturdy enough, the clasps (the ones which hook the shoulder straps to the bag proper) are seated so as to allow rotation. This may seem like a small thing but what it amounts to is never having to worry about the straps twisting around in opposite directions or bungling up on the shoulder. I should also note here that I'm a man of fairly generous proportions (3xl tall shirts) and the straps could accommodate a man even larger than me with ease.
Every single zipper has two zipperheads meeting in the middle. This is important as I always hate having to reach to the very edge of the zipper channel to access a pocket, two meeting in the middle means I can access a pocket without looking at the bag or bending over too much.
Before this bag, I had never had anyone ever comment on any bag I've owned. I've gotten tons of compliments with this guy. It's sharp, clean, stays new and fresh looking. Canvas bags I've owned would get grimy and acquire a brown tint so it was never quite as blue or green as when it was new. Black leather on my bag stays black leather, clean and crisp looking, no grime, no browning. I expect the same would be true of other colors of leather in these product.
Anyway, if anyone from McKlein is reading this, thanks for a great product!
(FYI: I own the "McKlein USA Lincoln Park Leather 15.4 Convertible Laptop Backpack")
I might just buy one of these as a backup or for my wife.