Well after the a bit of thunderstorm recently my internet was down during the evening, I called around 8:30am the next day and I told them the box unit that power the satellite is dead (it was connected to surge protector). They said they would transfer me to the IT department, which didn't call back after 3 hours. So I called again to ask someone to come to replace the broken unit, they're book so it'll have to be the next day. Not until noon the next day I got internet back. Almost a day and a half turn around. But my speed actually improved after this and the ping by a small percentage.
I also talked to the service person about the latency issue and even show the fluctuating ping in my system. We also spoke on the phone, but the other-side reply was expected that it shouldn't defer with normal web browsing. I guess I can't blame them too much since its WiMAX.
One thing I have to note is the way Clearband seems to hire people. They don't issue company van or laptops. The installer and serviceman bring their own van/truck, home laptop, and own equipment. The servicemen who did my installation was a roofer by trait (which is fine), but wasn't trained properly on the IT stuff and took until the second day to finally installed everything correctly, because of issues with his equipment and laptop. The second servicemen I met was extremely disrespectful, I won't go into details, but he doesn't even know how to greet. And base on someone else saying it only take 2-4hours for his installation compared to mine of more than one day, it seems to depend on luck which type of person you will get.
If you can put up with some of these issues you might save a little money and get fast speed, but really as you can see from my experience if you can afford more expensive service and don't mind paying a little more money for 20MBps ATT or Comcast, sure its 30Mbps slower, but at least you get consistency. One thing I like is I can use clone MAC address and use my my own router, instead of using the all in one ATT's UVerse modem/router box, but that's hardly a plus considering everything else I had to deal with.