I've used Pulumi for professional projects and personal projects, and I think it's fantastic. You can write your code in pretty much any major language (professionally, i use Python, personally I use Go), and you get the same output. Running the Pulumi program itself couldn't be simpler.

My one critique is sort of weird in the sense that Pulumi supports way more than its public documentation says. I hope they up their documentation game in the future, because there are a lot of things that I had to go digging through source code to find out how to implement. But that's really a minor nitpick in the grand scheme of things. Big Pulumi fan here.