After plunking down $850 for a new Pixel 2 XL I decided to leave T-Mobile for Project Fi. I couldn't be happier. The process of signing up and porting my T-Mobile number was easy and fast (less than 30 minutes). Also, the Pixel 2 XL has a built in eSim card. So I didn't even need to buy a new sim. I actually removed my T-Mobile sim card! The fact Project Fi bounces between carriers seamlessly is beautiful and seamless. I'm loving the fact I get refunded for data I don't use. Overall I have nothing but praise for Project Fi and I only wished I switched sooner to get away from "big carrier". If you own a compatible phone I highly recommend switching to Project Fi..