I purchased a new Mac Mini 2012 (had a 2011 and wanted to get the USB 3.0 and better cpu) and I wanted to add a SSD as the drive that will run the OS. I had good luck installing this same kit in my 2011 Mac Mini.
The "repair" went quite well but I learned from doing this before that it works best to install the SSD as the top drive and only have 1 drive connected when you go to install the OS. At first I had both connected and OSX setup both drives as 1 (fusion setup)
if you are adding a 2nd drive and not wiping both drives make sure that you install the new drive into the kit and make your current drive the top one