Except I won’t be buying one and you probably shouldn’t either unless you completely understand what you will and will not be getting!
Let’s go directly to what you will not be getting:

*Due to unverifiable media license authentication, the most common audio and video file types cannot be shared with different users using WD Anywhere Access. A list of the non shareable file types can be found here.

It is a long list of just about everything that you would want to share with other users on your home networks except photos and document type files.
A quick look at the user manual (PDF)suggests that up to 5 users can be set up with the same name/pw but does not indicate any deviation from the above sharing exclusion.
Do any of you have experience with this product?

Via boingboing.