It's really pretty easy, provided you're comfortable with that sort of thing. IMO, if you've built a computer from parts then you're definitely ready to take this on. Just make sure you follow all directions - especially the bit about properly removing the hot glue from the drive cable. Those cables are fragile!

You might just want to wait until the warranty is up, so as not to waste it - My Empeg developed a display board problem within the first three months of use, which I am very glad was covered.