I was a little apprehensive buying this given the power requirements of the NUC (12-19v, 65w) and did have a couple issues at first with it being overdrawn, causing the NUC to power off. However, it turns out the issue was with the cheap, Chinese LPS I was using for the Matrix X-SPDIF 2 interface that my NUC feeds into. When the LPS would drop voltage, it would cause the X-SPDIF 2 to power off momentarily and then kick back on after starting to draw power from the NUC, which also has an external 2TB, USB-powered SSD attached.
Once the LPS was replaced on the X-SPDIF (with a 5v variant of this iFi iPower Elite), any problems with insufficient power disappeared.
If you have a lot of devices attached to your NUC, this may not work for you, but if not, I can't recommend it enough. But check the power requirements of your NUC to be sure! The 10 series uses a much weaker GPU that has lower power requirements than the 8 series.
The changes the iPower Elite made were large and immediately noticeable. Most notably, noise floor dropped dramatically, making microdetails far more audible. Dynamics are also improved and bass slam/impact has more force behind it. The stage widened and deepened substantially with a much greater 3D presentation, providing much better separation between layers/instruments. I'm excited to hear how the sound continues to improve as both the iPower Elite and the iFi Nova cable bought to pair with it continue to break in. For anyone on the fence still: my wife noticed immediately that sound had changed for the better and I never mentioned that I changed anything.
Thanks to Andrew and the rest of the Bloom Audio team for answering my questions and getting this shipped so quickly!