purchased this unit last week finished install today at no fault to sonic.
i am still pleased with unit small compact did everything it was supposed too. DO NOT trust you tube video for install there is 3 wires on 16 pin connector that are not connected to t harness. don't know why they easily could be. so read instruction they point this out clearly other than that install was easy hook up t harness connect 3 wires to t harness then hook up can hi and can low. Now when i finished this the unit still didn't work turned out it was not flashed right from fortin i bought flasher flashed myself very easy and everything works fine. still with unit and flasher did not spend as much money as i would of buying elsewhere. still think it is a great deal. i would recommend getting flash tool as well