Summary: I have purchased two different NUC's. I run Linux on both to be a mediabox with Kodi/XBMC. I noticed this issue on both boxes. Then started to research it and found subtle mentions of this issue all over the net. This is not subtle.. THERE IS A SERIOUS ISSUE WITH THE USB.
Summary: This is an awesome little computer. Boots up in less than 5 seconds, is fast, totally silent, and mounts on the back of the monitor so it's completely invisible from the front. I'm never going to buy another full-size desktop again.
I liked this so much I bought a second unit for ...
David Hume, Amazon
4 March 2015
Summary: I liked this so much I bought a second unit for my ham radio station, where I didn't have space for a bigger computer. Easy to assemble, runs the latest Windows 8.1. I installed the wifi card, 16 gigs of ram, and a 240 gig SSD, all of which work well. Highly recommended!
Summary: This unit only draws 24 watts at full operation, and my tests rate it at about 12 GFLOP/sec. I am using it for power-efficient scientific computing, and it seems like a great little box. I've got Windows 8.1 loaded on it - using an external USB DVD player it was able to boot up very easily.
Summary: I have deployed 3 of these in businesses as a enterprise web app servers and mysql dbs. Added 16GB RAM, 500GB SSD....running on ubuntu. This thing is a beast. After a year of operation on one of them, it hasn't given me any grief so far. Small footprint is key.