I've been real pleased with the way the Transporter software team keeps adding features to my Transporters. They've added an API that lets developers connect to my Transporter, introduced photo features, and most recently added version support. Because the storage is on your transporter in your home or office, there is no limit on the number of versions of a document (so long as you have sufficient drive space). I like the way they keep rolling in these new features.
I started out using my Transporters as a family photo and video backup system. I then started adding files to it that I don't feel comfortable putting on someone else's cloud but with versioning and API's, I'm finding myself increasingly using it for working files.