Some thoughts - I’ve used puppet for a while and ansible more recently.

Ansible is easier to get started with

Puppet sequencing can be hard - and occasionally you get bugs appearing in odd places where there was a dependency that you hadn’t noticed - but things happened to work OK until some change

I’ve been using puppet and vagrant for a while, due to client choices we’re switching to ansible which I’m less familiar with - and Docker has been on my to learn list for a while.

I love vagrant - being able to bring up a VM locally that matches the production servers to a good degree is just brilliant, and being able to repeat deploys is invaluable in testing process.