It's bad ... but I actually don't think it's that much worse than any of the other cell companies. It does treat you more like a DIY option. But, it is bad.It sounds like it's good except for customer service. It sounds like it's really bad.
Tethering depends on the network and the device. Too much data I've tested ... they don't shut you down, they drop you from LTE to 3G.And if you use too much data, or tether, they'll shut you down.
I don't stream on the laptop. There are 3 Rokus in the house for that. It is just heavy web usage.BTW. General web browsing is about 1GB per 120 hours. When I work from home and remote desktop to my work computer, the usage is minimal. Only way you use 7GB in 2 days if you are doing streaming.