Bought for my father in law as a replacement cable for his new samsung tablet. Now he has one in the car and one at home with separate chargers so he can charge things when he needs them. The nice thing is that these cables also fit his new phone he just bought. He has NOT managed to rip the ends off yet because he doesn't unravel, just pulls on the cord. Looks pretty sturdy so I'd still give them at least a 4 out of 5. Not child proof but when it comes to elder protection it's a pretty sturdy product. I would recommend them. I don't know about fast charging.