Not terribly difficult, though I did install an SSD in my son's 20" iMac. Used the OWC data doubler bracket, which, of course, isn't designed for the iMac. I had to bend some metal in order to make it work at a very basic level, but otherwise didn't run into any real roadblocks.
Once they have, you'll be able to view a graph of their reputation gained over time.
Here's a preview of what the graph will look like:
No reputation gained yet.