My wife takes a 1 hour train ride to work in Dallas, TX each morning and 1 hour back to Denton, TX each evening. I'm paying $30/month for her hotspot on her phone. She uses about 300-500MB per month on her phone. Half of which is using it as a hotspot.
So while watching YouTube the other day, they had a 5 second commercial that I had to suffer through and so far, I'm glad I did. Back in 2000 I had a NetZero account as my dial-up service because it costs me $0 but it added an ad banner to my browser.
Now they have a 4G hotspot for $0 per month with no contracts, and more importantly, no ads. Yes, you have to pay for the device up front, but as long as you stay under 200MB, you pay nothing. They have other plans as well, but to just carry around with you in-case you actually need the Internet, so far it seems like a great device. Of course their network is limited, so you'll have to go to their site and see if they have coverage in your area. I used it today while waiting for Discount Tire to fix a problem I was having. Speeds on my iPad were awesome, or at least better than I had anticipated. I had 9.5Mbs down and 1.9Mbps up with a 120ms ping. Since I wasn't expecting much, I'm pretty happy with the results. Just my thoughts on the device. As long as it continues to work well, I'll be able to turn off her hotspot and save $30 per month. Who doesn't like saving money?