"Project Fi is cheap. Twenty bucks a month buys unlimited talk...

"Project Fi is cheap. Twenty bucks a month buys unlimited talk and text, plus Wi-Fi tethering. With data, you pay for what you use. Each gigabyte costs $10. Just $70 gets you voice, text and 5GB of data."

Not sure if that is US $ or not but seems pretty standard AU prices to me.

"Just two phones work with Project Fi at the moment: Google’s Nexus 6P and Nexus 5X. They’re among the best Android phones at the moment, but still, you are locked into Google’s handsets if you want to use Google’s network."

I don't know anyone with a Nexus phone.

http://www.wired.com/2016/07/googles-project-fi-wireless-service-crazy-cheap-switch/