How could you go wrong at this price? Plus they charge my iPhone that is in an external battery case. Most cables cause an incompatibility issue and only the ext. batt. will charge and not the iPhone battery, these work perfectly.
I guess I need to look into that warranty. It didn't last more than a few weeks before the connection stopped working unless I held it tight with my hand. I figured that this was simply a reflection of the price I paid for the cord. I had bought 2 other lengthside, so I merely switched to using the shorter ones.
I bought these because I had been getting power issues with almost every other Micro USB cable I tried, even OEM charging cables and other MonoPrice cables (the slim ones from their Select series). Other cables, even ones that work great for everything else, simply can't supply the current needed by the power-hungry Pi 3. After swapping out for these cables, I haven't had a single low-voltage indicator. Great cables (the Select series are great too, just don't try to power a Pi with them smartphones use high-voltage charging and don't have the same issue).
PROS: Able to deliver much higher current than most phone charging cables.