I switched to it in the early days and have been impressed ever since then!
Best choice if you're valuing minimal and bulletproof tool. Up helps you understand serverless, will not force you to learn a new paradigm
Been using it in production for more than a year. First the community edition and recently switched to the professional one, which saved me a lot of hours if I had to do the same things by hand.
I've been using Up in production for a variety of client projects over the last year, and it's been great. Not only that but TJ is incredibly quick to reply to any issues you might have in the Slack channel.