I choose Rancher 1.x for a large project at my last place, it allowed Researchers to run their algorithms wrapped up in containers. From the start Rancher was the perfect solution that checked all the boxes: really easy to use web interface, LDAP Authentication, automatic deployment of hosts, easy to wrap up deployments into catalog items. But after a few months it was just so unbelievably buggy due to the products maturity.

It's good to see they have got their focus right with version 2.