So a few years ago I heard about Connected Data's File Transporter on a podcast. It was sold as a Dropbox alternative, so I got one and ended up buying a second one to use as an offsite backup. I only ran across one real problem with the system (apparently trying to backup an iPhoto library on it is a baaaad idea) but it appeared really stable.
As time went on I started to feel a little uneasy about the transporter. I noticed that information was getting harder to find, transporters started disappearing from their store, the filetransporter twitter account disappeared, and a lot of other unsettling signs started popping up. It was the day that I noticed they went from being ConnectedData to Nexsan that I decided to start looking for alternatives. It wasn't worth the possibility that they quit supporting their products and I end up not being able to retrieve my data.
It wasn't until I updated my Macs to Sierra that a lack of care from Nexsan came to light. I was not able to install the Transporter software on my laptop because it was not supported and it didn't look like it would be anytime soon. In the process of looking for an installer I noticed they had a PDF on their site that said the End of Life for the Transporter in 2017. So I pulled the trigger on my alternative and am moving my data.
While I loved my Transporter I can't recommend any products from Nexsan. Maybe I am naive but I expected support for my product for more than 2 years after purchase. With the way they seem to be quietly winding down I just have a hard time trusting them for anything new. This is unfortunate because I really liked the product.