A perfectly excellent product right out of the box. I have the device on my 5700dn and my MFP 5800f, and just a note, the first one you setup, please be sure you put the plug onto the motherboard in the right orientation. It should only give you one orientation, but I could see how someone with no experience in putting one together could force the small connector cable in with a heavy hand. Once you plug in one connector to the motherboard of the device, you simply plug the device into the USB port of the printer, and everything works perfectly. I got an IP the first time I hooked up the device, and have had zero with the device subsequently. I couldn't be more pleased.