First off, the computer is not a bad build. I like it. However building a PC is simple. Just watch http://www.youtube.com/watch?v=lPIXAtNGGCw
and part 2 and 3, and it will show you all you need to know. The benefits are: satisfaction of building your own PC. It's cheaper, by about 30$. Also you know EXACTLY what goes in, as CyberPower IS KNOWN to make mistakes.
However, if you still want to go through with CyberPower, It's a good build. It's a very upgradable machine.