Other than the challenge getting the proper DIMMs for this device, it's been great.  Be sure you really really check the DIMMs you order to make sure they state they are compatible with this specific system (i.e., if using Crucial memory, go to their web site and use their tool to find the correct part number).  I ordered what appeared to be the proper DIMM part number from Amazon based on specs, but it wasn't recognized correctly by the NUC, although it did work.  It turns out the part number that DOES work for this system has one more character in it CT2KIT51264BF160BJ.The build quality of this little PC seems good and it runs quiet.  I have it running Ubuntu server 18.04, mounting a couple of USB drives.  The main workload is Openhab2 which it handles with ease and is quite a bit fast than running on a Raspberry Pi 3.