This is an excellent piece of kit but installing it is not a job for the inexperienced. Physical installation is easy but configuring the software is not. Mostly this is because the instructions need to be updated: I am running Windows 7 Ultimate, 64 bit and the instructions stop at Windows Vista. Also they ask at one point for a floppy disk to be inserted! Dinosaurs may remember what they were! I was trying to configure a Raid 1 array and eventually I succeeded. I now have the comfort of knowing that if one hard disk dies then the second one is there ready to take over, with no loss of data. Every couple of weeks I also copy a Disk image onto an external USB hard drive. This hardware is good, with the proviso that you need to have the knowledge to get it running, in spite of the poor instructions provided, before considering buying it.