On my ipad2 I have G3 service and really like it. It makes the ipad useful 99% of locations versus hotspots only.   I use it everywhere there isn't wi-fi: on the ramp, in the Legacy and in the car getting directions and email.   It is terrific and quite inexpensive and I've not run out of data using the ATT 250MB option for $15 which is a month-to-month plan.  Also, I have used the ipad in flight without the BadElf with excellent results because of the internal GPS device capability. In Canada, I simply swap out the sim card with a Bell sim for use at home.