as someone else said, no bag is perfect, so you have to chose what deficiencies bother you less, and what advantages you appreciate more.
For me, having used a regular cordura bar bag for years, and using a homemade plastic water cover for it, I went looking at bar bags about few years ago.
The Arkel stuff is well made, like all Arkel stuff, but boy it is heavy. Most bags now come with built in, attached waterproof covers, that Im sure work well, but in the end, the Ortlieb won me over because it is so much lighter than others, plus I knew its design is a no brainer for worrying about rain.

yes, of course it has 2 downsides--the version I have, the one with the poppers to open close, is a pain to open with one hand (so not easy to unzip while riding and grab a camera) and the cable mounting system is much more limiting than the easyoneasyoff Arkel and other brands. The cable system works, but once it is on, you dont take it off because the cable has tended to get sqwershed when you tighten it on, so it doesnt feed back through things as well next time.

like with all stuff in life, its deciding what things matter to you more, and for me the much lighter weight of the Ortlieb was the biggee. I bought the Plus one, with the lighter material.

As Im sure you know, they changed the closing system to magnets, so its easier to open now. From someone who carried camera bags around a lot, I'm not sure I'm comfortable with walking around with such an easy lid to open, either by prying hands or if the lid gets caught on something as you walk by and your camera topples out onto cement.....

buyer beware, six of one half a dozen of another.....it all comes down to looking at many options and then picking your poison.