I've been using Google Fi for many years and don't plan on switching. Since I don't like using my phone or use much data, this has been a good cheap plan to use over the years.
I used to be on Google Fi and my wife still is due to their excellent international roaming. Her monthly bills are far higher than mine on Visible though and I have much better reception and unlimited data where she's paying $10/gb.
I've actually never heard of this service. This looks like just a cheaper version of Verizon? This looks promising...