I have been using Calyx for the past few months, which is a 1 year pre-paid connection through the T-Mobile network for $750 the first year. No data caps, have used it in the Southwest, South Central, and Midwest parts of the country with fairly good results. I measure up/down occasionally and get anywhere from 30Mbps - 250 Mbps up / 1 - 25 Mbps down. Lots of variety in the signal based on location and time of day, which is my main complaint, but it should be expected with a mobile data connection. Not fancy, but I go through a lot of data at my job and generally don’t have much problems streaming video.
To be honest, I will probably try to switch over to a fiber connection when my year is up because I’m not longer working from the road, but it really hasn’t been the worst solution by far.