I have 2 ortlieb bags and they are way better than my newlooxs (also a dutch company I think)
The backpack and bike bag in one is very nice. My girlfriend uses that one and I use the bigger size shoulder strap bike bag. Very thick material and nothing inside has gotten wet yet.
Ortlieb truly is the number one brand when it come to bicycle equipment. I do know people who have had their Ortlieb bags for close to 20 years now and they're still in top condition.
I think Fjällräven was great some twenty years ago but has since been sold and bought and traded and is yet another one of the overpriced former outdoors gear now lifestyle brands nowadays. AFAIK it is still good quality in the upper tiers but very far from the affordable lifetime investments they once were and that made them great.
I bought one from Feuerwear last year and I'm in love with it. they make all kinds of products from recycled fire hoses, so the markings on each item are unique.
Yep, got myself a Jääkäri S after getting fed up with backpacks breaking all the time. This time it actually seems like it can stand up to the test of time and lugging two laptops around everywhere.
Whatever the brand, one thing to keep in mind is the material. Nylon (polyamide) can take much more abuse than e.g. polyester. Good if the bag bottom is as continuous as possible instead of being held up by seams. Savotta also adds reinforcement on the bottom so it doesn't wear as much from weight.
If you happen to be in Finland it's Jääkäri S currently on sale in Motonet for 90 € – not sure if they ship elsewhere in Europe though.
I have a Sandqvist now for nearly 8y daily use on workdays and multiple airtrips as a carry-on, looks a bit rocked, but function-wise and material-wise I never had a problem. No seam losen, no no deformation, no show of wear on any straps and no breaking on any plastic part. Top Quality. For a Price. I thought about buying a new one... but why? It is still a fully functional working backpack with only slight look of usage after daily use for nearly a decade. But a new one would have a fresh new look. But then again, what would I do with the old fully-functioning one? I have to stay with that bug for another 10y I think.
I just ordered a Weitläufer ultralight pack from Germany. Though it will probably take a while until it arrives as they have some lead up time on their production.
I just bought a Thule backpack that I'm quite happy with. They have quite a wide selection of options, so they are worth checking out.
I bought an Aion, main reason being that it could fit a normal 14 inch laptop (a Dell latitude if you are curious) and a 13 inch MacBook air at the same time which was the main reason I wanted a new backpack.
I don't have a suggestion, just wanted to point out that my favourite Samsonite is american and I shall avoid it from now on, no matter how great their stuff is :(
I have used my Retki backpack for about 10 years now. It's starting to fall apart at an increasing rate, so I should probably replace it someday. I don't know if they are sold outside Finland, though. https://retki.fi/en/category/backpacks/
High Peak Outdoor seems to be a German brand under Simex Outdoor International GmbH. I have experience with their "Zenith 75+10" unisex adjustable backpacks for trekking etc. (we own a couple of those), and we are satisfied so far, after multiple railway-based camping trips.
Made in Prague. Got one when I visited a few years back. I really like the aesthetic and the webbing on the outside is super useful to pack extra stuff. Quality is also top notch, no signs of wear after quite heavy use yet.