Sorry for the very late reply but I wanted to do a few trips with the Standard Luggage before commenting.
I’m not 100% sold on it (well I guess technically i am since I bought it). I have about 12-13 kg of luggage and it fits great. It seems to be the type of bag where you can always squeeze a bit more in. The extension zipper is great. I’ve actually packed it with the capacity extended then zipped it to the smaller size to compress everything.
The shoulder strap doesn’t work for me at all. With that weight in it, the strap presses badly into my chest. As a backpack, it works okay although i’ve never felt quite balanced with it. I don’t usually travel with backpacks so I’m not sure what is the norm.
There are a lot of pockets, maybe too many. I’ve found I have to be a bit on the ball about what i pack where so i lose things. There are two internal pockets + one bigger compartment behind them, two external ones at the front then the laptop one at the back.
I don’t like it opens up length-ways - the bag is quite long and thin and the top flaps over on the thin side. Sorry for my poor description, but if you want to lay it out flat for packing, you either need a very big space or have to use the bed or floor. Also, because it’s soft sided, you pretty much have to use packing cubes or stuff spills out until you zip it up.
I’ve not used it as carry on at all because all my flights have been Air Asia with a 7kg total carry on limit.
Overall, I think it’d be a great bag for weekenders or short trips but probably not the best option for carrying your whole life around.