I purchased the 8i5BEH NUC during one of Amazon's flash deals.  I am extremely happy with it so far.  I am running windows 10 Pro with 16GB of ram (2 x 8GB Crucial DDR4 2400) and an NVME drive.  Word, Excel, and other Office 2019 program open in one second.  I have it connected to my wireless mesh network, and pages load instantly using the onboard WiFi.  I also have the previous generation 7i3 NUC; the 8th generation i5 runs circles around it.  I wasn't unhappy with the i3 per se, but it was just a little big sluggish... especially in comparison.  The difference between the two is immediately obvious.  I tried using the 7i3 as my main PC for a couple months.  It was adequate, but I didn't love it.  This, I love. It's tiny, quiet, and blazing fast.I'm taking off a star because the Intel Driver and Support Assistant will no longer scan the device to identify drivers automatically.  It worked once, but every occasion since then I can only get the dreaded "Oops, something went wrong while trying to scan."  Irritating, but not a fatal flaw.  I can install stuff manually, but the Assistant was great while it worked.