Anker’s PowerPort Speed 1 is basically Anker’s take on Apple’s 29W USB-C charger that comes bundled with the 12" MacBook. They’re both small bricks with a single USB-C port, power throughput is almost identical (the Anker ekes out one extra watt), and they’ll both (obviously) charge that 12" MacBook at full speed.
You probably see where I’m going with this, but there is one big difference: Price! The Apple charger will set you back $49, while the Anker is on sale for just $19 with code ANKR7214. If you own a 12" MacBook, this is a great chance to pick up an extra charger for your travel bag, or to keep plugged in full-time at your desk, so you don’t have to keep constantly moving it.
Anker’s PowerLine+ USB-C cable is also on sale, if you need an spare.