Wow. There are some in modern society that I would have a difficult time wanting to answer...
For the others, I've found that the plan is definitely a 12MB plan. It does not block streaming. The problem with streaming is the Moxee hotspot. I moved the SIM to a Nighthawk 1100 and the plan works approximately 10000000 times better so far. Not great but better. The Moxee is pretty bad in my experience. I have an AT&T prepaid SIM in that thing and it effectively rendered that plan worthless too. I suspect much of that issue is location based in combination with low end hardware.
I gotta say that I truly miss my Sprint FMCA plan. I found it to be ridiculously reliable. I'm sure FMCA will get the kinks worked out with this one also or they move on. I think some patience is in order...
Darrell