Summary:
The first cable didn't work at all, the second gave me issues from the start and finally physically broke apart.
Amazon does not provide support for these cables if they do not work.
Edit, Aug. 2020: Two weeks after making the previous review I went out and purchased an Anker cable, and it's still holding strong without any issues after a year. Moreover, Anker cables come with a warranty, which alone puts them above these overpriced, broken-on-delivery, no-support-offered Amazon cables I'd definitely recommend giving that brand a look, in place of this one. ^.^
Details:
These cables appear to use a cheap glue to hold the USB connector into the cable. This glue will wear down after a while, even without any stimulation to the cable. At first, this will cause some input delay that will only be slightly noticable, presumably due to the inner connections becoming less firmly connected. Then, as the glue wears down further simple act of removing the cable from the usb port will completely break the cable. Looking at how the USB connector breaks, the inner metal materials seem to be incredibly cheaply integrated as well, and very poorly inserted into the connector (thus explaining why data flow was problematic to begin with, and why the simple act of glue weakening was enough to deteriorate data flow further).
In short, this is as poorly made a cable as you'll ever find. You can basically load any random listing and find a better USB to Micro-USB cable than this, and given how extremely common these cables are, you've a wide selection of brands to choose from. Do yourself a huge favor, and avoid buying this straight-to-trash-can cable.
To add insult to injury, the order never gave me a support link for this particular product. Presumably, that means Amazon simply does not provide support for this product- as such, there's yet another reason to avoid this product, given how Amazon will normally give you product support for just about anything on their site. Presumably, that means non-Amazon-branded USB cables may receive Amazon support where their own branded cable does not. Though perhaps it's simply that they don't provide support to cables at all. Either way, there's a lot of risk in this purchase.
On the bright side, if they ever improve the quality control.. by a significant degree.. then this cable is of an appealing length and aesthetic. I'd definitely be able to firmly recommend it if the quality was even just average, rather than so far below that.
Seeing as I intentionally paid extra over other brands to get this Amazon brand cable, I'm most certainly disappointed in how things turned out. The most absurd element is, Amazon is fully capable of making a decent USB to MicroUSB cable, as they make them (in better quality) for their Amazon tablets. Makes you wonder just how they managed to bungle things up so elaborately, here.