Yeah, it's definitely Google Music. There was some Slingboxing in there but not too much. Don't remember the numbers offhand but Google Music was the top draw.

Unfortunately, I'm not seeing anything good in the way of 4G LTE hotspots available on Amazon. T-Mobile wants $120-$168 for their devices depending on which model, and their website doesn't really say what differentiates them. Having to pay $150ish for a device significantly negates the cost-effectiveness of the Mifi plan, at least for the next couple years, and by that time we'll be on 7G or whatever and the device will be obsolete.

Now I'm thinking the two voice SIMs approach may be the winner.