These are recertified units, I can not recommend a purchase unless you know your tech stuff.There are a few gotchas here with this listing. When I received it I found that WiFi and Bluetooth are not based on the Dell M.2 WiFi card, but rather a pair of cheap USB devices. These consume 2 of the USB ports and have a limited range. I have had to order an M.2 Wireless card.Hyperthreading and Virtualization had been turned off, it is on by default when Dell ships this unit. So it was not reset back to factory default. I discovered this when I saw that there were only 6 threads running when it should be 12.The drive tray to install a 2.5" SATA drive is MIA, so I have had to order one. The base to stand the unit vertical is also missing, but I am not placing the unit in that position so I don't have to find one of those.There were no installed Dell support apps, which indicates they were either stripped from the OS image used or did not use the proper Dell OS image to restore windows.The installed BIOS was some sort of Beta. I had crazy wired networking issues when testing and after a day of troubleshooting, I was about to reinstall Windows when I got an alert from the Dell software I had installed that the BIOS had critical issues. I had to flash the BIOS to get wired networking to work properly.If you know tech and looking for a good machine that happens to be in a Micro form factor, I think this is one of the best buys going at the price I got it for. It more than meets my needs. It was listed at just about half the price of a new unit.