This app works great and the only people that complain are due to their negligence to actually go to the googlevoice site login since when you login itll strictly say that it is NOT available in Canada as a service. This app does not deserve low ratings from ignorant people that cant do some research before they download. The "magic key error" is the error that you get when you do not have service in your country for googlevoice, hence if youre in Canada you will get that error. Otherwise this app works great when I went to the states. So just sit tight and the service will be available in Canada too.
SSS1508 about GV Mobile + for Google Voice