Wife and me on Google Fi, and she had good luck with it 2 months ago in Italy and Barcelona, but some data connection problems in some other cities in Spain. Probably teething pains getting it all hooked together. Take the "free" part with a grain of salt. I think there is no surcharge for the data, but you still pay $10/GB just as in the US. New part is the higher speed data that you supposedly get now depending on the carrier you're on in each country.