I bought this strap for my new 5 string JB, whis is quite heavy (5,6kg), because I already have similar strap in different colour (Harley Benton Guitar Strap Padded Brown) and I am satisfied with that old one.
But this new black one, when compared with the brown one is much worse. I think, that in factory they forgot to add one layer of leather on the inner side of strap, because on the brown one, there is smooth surface on both sides of strap (except shoulder pad of course). Not the same on this black one - the inner side of strap is rough to the touch and crumbles small pieces of black fabric. Also it doesnt feel as sturdy as the brown one.
I have no courage, to use it with such heavy instrument, I don't trust that it can carry the weight reliably. According Thomann description it should have reinforced strap button holes, but it hasn't.
I will not send it back, because I will use it as a strap for one of my spare guitars, which I don't play often, but I feel a little disappointment with this purchase.
I hope that this is issue only with this one piece, not with all of the production line.