tl;dr: The Innergie PowerJoy USB-C charger is a solid power adapter for charging via USB-C and USB-A simultaneously. If you have a high-power-draw device like a MacBook Pro, then the adapter may have a little less utility, but if you use a smaller USB-C device and need to charge both it and a USB-A device, then this is one of the most compact and well-built adapters I've used.
A month ago, I received an email from Innergie asking me if I'd like to review their new USB-C charger they were releasing. I had just returned from a business trip and was slightly regretting only having my MacBook Pro's included USB-C charger, which has one USB-C port. Charging my phone meant plugging my laptop into the AC adapter, then plugging a Lightning cable into my MacBook Pro.
I didn't want to have to bring along a separate USB-A power adapter, but it would've been more convenient, since I could charge the phone separate from the laptop.