I received a 120mm fan with a thermal controller and power supply from cooler guys for an x-mas gift. I believe it was purchased through amazon. The thermal control does not work. The 4-pin connector from the power supply does not power the unit unless you manually hold the plug in with some force. The thermostat seems to be off as well - with power supplied, the fan constantly ran despite being 10-15 degrees below the threshold for turning the unit off. I believe that my unit was returned to amazon as their appears to be some damage to the screws/cover of the thermal control.
That being said, coolerguys have stepped up. They are sending a new thermal control with a RMA to return the old one. Customer service so far has been great and they seem to stand behind their products - even if they didn't sell them direct.