Summary: I've given this 2 stars because it is possible that it might be OK for an expert user. From my point of view however it scores zero stars. It was fiddly but not difficult to install the new WD Red hard drives that I had also bought from Amazon, and the Cloud-based initialisation works beautifully.
Summary: Very easy to set up and configure. I use it as a shared network drive, which works very well with windows 8 File History (Start -> File History). I didn't have much luck with setting it up as an ISCSI drive (so it appears like a local hard drive attached to your computer).
Summary: Having a few different NAS units, including a few QNAP, I bought this for a wee unit for occasional (Semi) portable use. Frankly this was a mistake, as I am only competent at Linux, not an expert (see other reviews).