I've had Clear for 18 months now. It had a lot of rough edges at the start but the service has been pretty stable lately. Maybe two outages lasting 2-6 hours each time.

I'm literally next door to a tower, so my experience is going to be better than most, I fear. I get 2mbit down and 1mbit up on a typical day. 8mbit down on a great one. I seem to get better speed after an outage, oddly enough.

The price is about 1/3 what Comcast would charge (I have the two-plan bundle: home net and phone service). No complaints about the phone service at all except for the extreme ping times. Talking to a mobile phone from the "home" phone is just as laggy as two mobiles talking. International rates are awesome.

I've run a light bittorrent set over it with no problem. I haven't hit a usage cap so far. Customer service, as others have noted, is pretty bad. AT&T/DSL-level bad.

I have Clear 4G as a backup and have found the speeds to be highly variable and sometime have no service at all. I live in an "excellent coverage" area and keep the little WiFi hotspot on my window sill.

Also, their customer service is.... not great.

Sprint uses Clear for their 4G service, and I have a Photon (which is known for good reception). Service is awful.