I put a WD Black² dual/hybrid drive into my iMac and ran into one glitch that's worth mentioning, since I didn't see anything about it on support forums or elsewhere.
If you are trying to re-format the drive on a Mac, the instructions say it has to be the only internal drive in the machine on the SATA port. So, that's one thing to watch out for.
But the other is that — in order to run the Western Digital applescript apps that set up the drive as either a Fusion drive or two separate devices, you have to unmount the disk in Disk Utility.
If you don't you will see this error:
The action "Run Shell Script" encountered an error. Check the action's properties and try running the workflow again.