In December I added 400 minutes which were doubled from my home in Calgary. I called them and they added the minutes but they did not activate until I crossed the Montana border.
I also activated Dell Voice which is now Fongo for use with my laptop in a WiFi area here in Yuma.
This is only available to Canadians gives you a local phone number and you can call anyone in N/A for free. If you wish to add International minutes the cost is minimal.
The reception is amazing but I did find you have to use headphone or the other party thinks you are in an echo chamber.