I've been with Project Fi for over two years, and on average I use about 2 GB of data of month. I pay about $50ish per month.

I originally got an LG Nexus 5X and it lasted until about a few months ago when the phone's dreaded bootloop issue killed it dead, so now I have a Moto G6 (I like that recently they've expanded to a wider variety of compatible outside phones: Originally you basically had to order a compatible phone through Google since there were only 2-3 varieties, but now you can buy a qualifying unlocked phone in any store).

I only mention the phones to say that I've never had the issue of Android OS using 1 GB of my data, and admit that it might be a product of what phones I used. But I also kill nearly all notifications on my phone, as well as disable a lot of default apps. The only major data hogs on my phone over time have been Twitter and Facebook, and that's all on me.

If you've got understandable hangups over Google's collection and usage of data, I can understand that. It might not be the best move to take on a service run by Google if you've got those reservations, when they have their claws in Android OS and practically mandate their apps be all over the OS.

But I personally have little shame and couldn't care less what of my data they have, especially since I have Gmail and they pretty much have all my info through there anyway. I disabled most of their data collection on my main Google account, and really only enable GPS on the phone for various personal reasons.

That aside, the service has been terrific. No frills, not expensive, and super reliable. You can even use data as normal outside of the US, though calls still cost extra. If the Google privacy concerns aren't a dealbreaker, it may be worth it.