I use one. I was blown away by the value of the 220$ Xiaomi MI A1. It's nice to know that I can move between some options for manufacturers to get the best value for my budget, and also expect a consistent experience.
Getting one of these phones in the US comes with other risks as well since your importing g from China. No warranty for one. Little you can do if the phone is delivered to you in some defective state. I only have full 3G coverage with AT&T. That said other experiences I've read on Xioami's phones have been largely positive. Really cannot stress how amazing of a deal the MI A1 is. Feels like a spiritual successor to the Nexus line.