I bought the device as an open box unit, and that has not been an issue. I have had this i7 device running in my music production studio for about six months now with only one concern. The Intel NUCs as a whole have an issue where sometimes they will not recognize an internal hard drive on boot. Searching Intel support revealed this as not an issue with my unit alone, other people are reporting this as well. Unplugging the power for 10 minutes and then trying to boot again usually solves it when it does occasionally happen. Still happy with its quiet performance and very small footprint. I paired a compact Logitech bluetooth keyboard and mouse to it. Runs my Ableton 10 with demanding VSTs well, and I like as a compact alternative to using a more bulky laptop.