Well, it’s good that it’s rechargeable. It wouldn’t recharge a lot of phones otherwise.
Why does it charge with USB-C and then have to use USB-A for power supply? If it were true USB-C, you should also be able to use the same port as power supply.
Also, the '18 version got rid of the status indicator button, now it’s back. So the only difference between the '17 version is the need to carry around a USB-C charger specifically for this, a bump in capacity, and a doubling of price.