I took this exam because there was a free code in April, not because I needed another cert or thought this one would add any value. I went through the Trailhead for it a while ago but didn’t do any studying for it. I completed this certification in less than 15 minutes.
If you’ve been studying for the admin exam and want to take a test that’s pretty cheap ($75 for this vs $20 for the admin practice exam on Webassessor), go for it. However, if you already have your Admin cert, there isn’t a need to take this certification. If there hadn’t been a code available to take this one for free, I wouldn’t have done it.