I bought this to extend the capacity of a surveillance system and it worked flawlessly , from the moment I took it out of the box. The craftsmanship is terrific, it is solidly built and was exactly what I was looking for. FYI- This is an IDE (EIDE or PATA) interface on the interior tray and you have to be very careful when trying to match specifications, as the standards are changing. There is no room for (SATA) translation cards on the inner tray. Also , in order to keep the heat down, you should install your hard drives as far to the front as you can so there is room for the heat to be dissipated properly by the fan on the back of the rack.The connections are solid and tight and they report correctly through the BIOS. I am really happy to have found these.