For me it is the USA/Canada coverage at a very reasonable price. I used to carry a 2nd phone for the US (a flip phone no less). Did not have data in the US. Now I have it all on one phone.
I have had some dropped calls though, but cannot compare with other providers on that aspect.
The community and rewards aspect is quite interesting. How Fizz managed to provide customer support via a game-type format seems quite novel and looks like it works fairly well. The good-will and cost savings to Fizz that such a mechanism creates must be enormous. .
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