First off this is a fast device.  I topped mine off with
  
Kingston Technology HyperX Impact 32GB Kit (2x16GB) 2133MHz DDR4 CL13 260-Pin SODIMM Laptop HX421S13IBK2/32







  
  
    .  Second, I added a
  
Samsung 950 PRO Series - 512GB PCIe NVMe - M.2 Internal SSD (MZ-V5P512BW)







  
  
    to the mix.  To say the least, it is extremely fast!  However, as an early adopter... BEWARE!  The road was a bit bumpy as there were issues with video (like not being able to see anything on certain displays) until I installed the latest BIOS.  Once past that hurdle, things got a bit better until I encountered some significant issues with the HDMI digital audio.I am using it for a media PC in my home theatre system which is currently a 5.1 multi-speaker system.  My AVR is a Denon AVR-S910W which runs great (sound & video) with my earlier Broadwell (Core i7) version of the NUC (NUC5i7RYH).  However, no matter how many times I've tried with this new Sky Lake version (Skull Canyon) NUC, the HDMI Digital Audio will only show up as stereo and to get any sound out I have to set it to 7.1 (not 5.1) and even then it only plays out of the two front speakers (fron L/R channels) or in stereo.  I have escalated the issue to Intel, who provided me with some beta version of the drivers.  That did not work either.  My AVR is works fine with a 5.1 speaker configuration on my older NUC, but not on this one, as stated earlier.  My best guess at this point is there is a glitch in the firmware that is preventing it from interfacing properly via HDMI.  I've seen another post about this very same issue on the KODI forum too.  I should also mention that in the advanced sound properties (supported formats) the options are maxed out at 24-bit 96000Hz (Studio Quality), whereas on my older NUC5i7RYH they max out at 24-bit 19200Hz (Studio Quality), which is also problematic.  I've also ruled out the HDMI cable as I've tried more than one, including the latest HDMI 2.0 compliant
  
AmazonBasics High-Speed HDMI Cable - 6 Feet (2-Pack) (Latest Standard)







  
  
    .On the other hand, the video looks fabulous with stunningly deep, rich color running at 60p on my 4K UHD TV.  No complaints there.  Intel seems to have gotten it right with the video and almost everywhere else with this device, except the digital audio.I guess I'm not giving up yet on this unit, but first waiting to see what Intel's response is to this issue.  Right now, I'm still using my NUC5i7RYH pending a fix of the NUC6i7KYK, as my newer one is not much use in my home theater system without properly functioning digital audio.  Given this is a new product, I'd expect some glitches here and there.  However, in my opinion this is a MAJOR "break" that needs immediate attention from Intel before I'd recommend that anyone jump into this product.Right now I'm giving it a three-star (average), "buy with caution" rating, pending outcome of this issue when I'll provide an additional update.  To other "early adopters" of this product, I hope your experience has been better than mine.