I particularly wanted a wireless NAS to live in the loft, then if I get burgled and my PC's taken, I don't think thieves would find the NAS up in the loft under some tatty cardboard.
Installing the hard disk was a bit fiddly, but not too bad.
Configuration was a little clumsy, and I could not get WPA working, had to fall back on WEP (Might be my paranoid Draytek router).
The browser based config tool is not very well constructed in terms of HTML and is a bit confusing.
Having said all that, it works just fine. Very reliable, Norton Ghost backs 3 PC's up overnight (with a bit of careful scheduling to overcome the limitation of wireless.)
Overall, I'm happy with the purchase.