There are cheaper NAS devices, some even come with a Hard drive already installed, but if you want something that performs well, with an almost infinite number of possibilities (Add on Packages, configuration options etc). Then I don't think anything else comes close to this.
You don't always get what you pay for in life, but in this case, you do!
With this NAS, I not only am able to have a centralized place to store my media etc, but with its FREE optional packges, I can now share Photos and other files with family and friends all over the world (and probably beyond).
So far (about 2 months) it appears to do everything, and it does it very well, Enjoy!!