After 2 years of use, the straps on the case are broken. I exchanged a few emails with Artonus, and the answer was very disappointing. They told me "sorry, but the straps are not part of the violin case."
I caught the violin case mid-air when the straps broke while I was trying to put it on my back.
With Bam, I never had this kind of problem, and they have an outstanding customer service.
So, my conclusion is that Bam is like the Mercedes-Benz of the Cases, while Artonus works like a very cheap case, but the price is not cheap.