Have you ever used Mint Mobile?

Mint Mobile is really pushing their services in my area. I’m currently using T-Mobile & Mint is renting T-Mobile’s towers so I’d still be using the same network & at the same time saving about 66% off my monthly bill. I did something similar with Sprint & Boost years ago & I was sure glad I did! I can’t seem to find anybody who has tested the waters with them, so I’m checking here. If you’ve used Mint, what was your experiences?