It's just like the early days of cell phones, if you're in an area with good coverage it works great. 1Mbps for a mobile/wireless internet connection is nice to have. In my region of Texas, they have good coverage and so it's a good solution with a laptop.
But, check your coverage map VERY carefully and if you live/work in a downtown area or in a a building that is built like a bomb shelter, don't get it
They have "no contract" options down here, so if you can afford it, and they offer that where you are, you can test the waters.