Who all is doing Cisco SDA? Does it actually work? Is it worth it? What is your experience with it?

Im curious whether the technology is stable enough for a full blown SDA deployment? I realize you need Cat 9k, DNAC and ISE to use the system and Im considering doing a POC very soon. What else do you need for SDA? What all have you see as major benefits and problems with the solution? What skillset is most beneficial to have when deploying SDA? I have a R/S background with a lot of VPN/MPLS/DMVPN overlay solutions and In hoping that background will help with the fundamentals. From what Ive seen on ciscolive, it seems like it might be ready for action...

Thanks for any feedback.