I purchased this for iPad Pro (latest version - 2018). Unfortunately, it does not work at all (won't sync and won't power up with iPad pro original USB C-USB C cable) . However, using same configuration as above, I tested this with Samsung phone and it works (sync and power up). Hence the 3 stars as it did not meet my needs.
Update: Seller sent me a USB 2.0 to USB C cable as a token of appreciation for my comments and my inconvenience. The cable works well for iPad Pro (both power and sync), hence I have revised my rating to 5 stars for their service and correction.