Clearwire sucks. I was patient with them. I gave them far more chances than they deserved and now I'm probably going to get stuck with a $200 cancellation charge.
I got clearwire about 7 months ago and was initially happy with the service. I even recommended it to my sister. Then, without notification, they killed my connection. No warning, nothing. Just dropped. They said I'm using too much continuous bandwidth. So I asked for an indication of how much was acceptable. They asked me to reduce my use because it was hurting other users. So, wanting to be a good citizen, I capped my continuous up and down rates. A few weeks later, they drop my service again. Again with no notification. I call in and ask again if they have a usable definition of "acceptable use." Maybe this tech was new or didn't know the Clearwire policy of avoiding useful answers and he told me that down rates aren't a problem, but keep the up rate below 8 kB/sec and we should be fine. So, I did that and I was ready to live with it. Then they throttled P2P programs. They never said that they did, but it was obvious when they did it. One day I was getting a nearly continuous 150kB/sec down. The next day, I was lucky to see an intermittent high of 15kB/sec down. Again, they never notified users of a change of service. I would have stayed with them even through this P2P throttling, but now they've cut me down to limp mode (around 58kb/sec) to get me to call them again. The only problem is that my VoIP phone won't work at this transfer rate, they don't reply to incoming emails, and the people you can reach through their chat application are useless.
All up, they clearly don't want customers that intend to actually use their internet connections.
for lots of similar stories see the dedicated blog: Clearwire Sucks.