[Sohcahtoa82]

I'm on Google Fi and I don't think I've ever experienced this.

Of course, this is just anecdata, and maybe I haven't experienced it because I just don't tend to use a lot of data (< 3 GB/month), and rarely go to areas that will have highly-crowded cell towers.

[shkkmo]

I'm on Google Fi and also don't use much data. I've recently had some significant struggles with Google Fi support over persistent issues with having a full strength connection and no data. This only ever happened when Sprint was the data carrier.