Just an FYI....most of what they are collecting with regards to vehicle speed, location, seat belt use, etc, etc, is not just collected by On*
When your involved in a serious MVI (Motor Vehicle Incident) Law Enforcement does a download from your OBD-II port and gets all that anyway.
I also question the ability of the system to function after your account is terminated.
I have personally been involved in numerous police investigations where tourists have had their GM vehicle stolen or carjacked and On* says they can't track a vehicle without the account being re-activated from inside the vehicle first.
I have also contacted On* regarding incidents of suicidal people with firearms inside their GM vehicle with On* and even though I explained to the On* Advisor that this situation is life or death they still can't track the vehicle.
For investigative purposes Law Enforcement needs a warrant signed by a Judge to track your vehicle or listen inside so don't believe everything you hear.
As far as On* providing speed information to Law Enforcement for the purpose of writing tickets that is complete and total BS.
The big advantage of On* was previously stated on this thread and that is the fact that the On* VCIM (Vehicle Communication Interface Module) is 3 watts and with the roof top mounted antenna it has much better range then a cell-phone sitting on your console in an RF (radio frequency) tight vehicle.