I use a T Mobile 4GLTE ZTE mobile hotspot while traveling in Oregon and Washington.  I converted to BingeOn the day it was offered.  In hindsight, I should have waited a couple of weeks to let T Mobile get the kinks ironed out, but now BingeOn seems to be working as advertised.  We watch mainly Netflix and have verified that streaming Netflix for hours does NOT use up our data allocation.  Our system set up: T-mobile ZTE mobile hotspot with 6GB/month plan, iPad, and chromecast attached to the HDMI input on the TV.  We set up watching on the show on the iPad and then "cast" it to the TV.  Other comments: 1) make sure you have a 4GLTE connection or BingeOn is worthless, 2) background programs on your tablet or PC can still use a lot of data.  Once your 4GLTE data bucket is used up, T mobile reverts to 2G.  3) Make sure you ONLY stream BingeOn approved sources.