Used with the ATEM mini Pro to stream via the internet. Once you've sorted out port-forwarding to get round fire walls it works really well. There's a very good instruction vid by one of the Blackmagic guys on their website which explains exactly what the unit is capable of.
It's also very useful to provide another program output from the ATEM mini pro if plugged directly into the ethernet connection of your unit. This leaves the ATEM mini pro's HDMI output available to provide a multi view out of your inputs, whilst getting a program out on HDMI or SDI from the Streaming bridge.
Not used it much yet, but so far it has performed faultlessly. A great bit of kit.