I had WiMax from Clearwire. It was really epic. The dongle on my laptop delivered speeds that weren't even available wired at the time. I used it in Seattle, Phoenix, Chicago, Newark, and a few other cities, and coverage wasn't bad at all.
The only difficulty was that it had a hard time penetrating buildings. In my apartments, I could get 1-2 Mbps anywhere. But if I moved the modem into a window it was more like 25-75 Mbps.
I hope that some day 5G will be as good as WiMax was.
