About to switch

I have been with TMO for the past four years, and while their service is great, the prices and hikes are not. I have two lines (wife and I) that I would port over and more than likely use Lightspeed as main, Warp as secondary.

My question is, how do you all like USM? I’m so tempted to cross over, cut my bill in half, and enjoy freedom. I’m just a little hesitant because they are an MVNO