Trane BMTB comm3/4 communication bridge

Curious if anyone is using the Tracer communication bridge BMTB001AAA00 to get comm3/4 equipment to BACnet/IP into a niagara system? I have many customers with old BCUs and comm3 UCMs, looks like this could be a viable solution, although it looks like Trane has made this primarily for use with their Tracer SC product line. I'm looking for feedback on how well it works. Is it basically a watered down BMTX? Does it automatically create all the comm3/4 data points into bacnet variables or is that still done manually as you would a BCU?

Thanks!