I bought a Xiaomi 2 a few months ago, and I’ve been really happy with it. I only really use it for stuff like games and directions, but I haven’t found anything that won’t run on it. I think the only real difference between the 2 and the 3 is processing power, so it really depends what you want to do with it.
The only thing that sucks is you’ve gotta register to get one (in Chinese), then once you register you’ve got about a 2 minute window at a specific time on a specific day of the week, and even then they sometimes sell out after 10 seconds or less. Small production line I guess, plus it seems like everyone in China has one these days.