I had Google FI for about a year and a half. I loved it. Switched from AT&T. I had a similar amount of dropped calls (5-10 per week around rush hour a few miles from downtown Dallas.) I loved the savings. Google and my cable company had so many hotspots around town, I rarely used mobile data and regularly used my phone as a hotspot. Bill averaged about $35 per month. I bought my phone for $150 (Nexus 5x.) I bragged all the the time about my savings.... Until it happened.
My phone **** the bed out of nowhere a few days before Christmas. Would not cut on at all. No store for help. No backups. Nothing. I used a friend's phone to call in to Google, because that's the only way to get a new phone or sim card with Fi. And since it was around Christmas, it would be a week before I could get a new phone. I immediately went to Verizon, got a new pixel for $200 bucks, $75/month unlimited plan and never looked back. No dropped calls ever. Battery drains faster, but otherwise everything is better with Verizon vs Fi and ATT..
Fi Network was weak in rural areas too. Be warned about the lack of stores... Nice thing about ATT, Verizon, Sprint, and even TMobile is they are everywhere and you can get a backup ASAP. I would get a prepaid ATT, Verizon, or Sprint before considering Fi again.