Strap is a true issue. My older sling had a cheap strap that felt painful close to skin especially in the neck. The DS3 looks rough like the one I had. Definitely not seatbelt smooth like the city sling's.
Just ordered this bag, only thing I’m worried about is the fidlock because so many reviews on their website saying it opens on its own a lot . But I also think people are just exaggerating. I was thinking about getting the Tomtoc bag instead but it just doesn’t look as clean as the day sling 3. And the inside is great too.
I would say it does have accidental unlocks. I haven’t read what other people have said on their site but it probably isn’t far off from the truth. But at the same time it probably isn’t as bad as they say it is either