It's surprisingly easy to set up and run, even with redundancy, integrates well with Jira, Confluence. Was fast enough, stable enough, had everything one needed (offered more than a hosted solution such as github). IIRC kept git completely separate, so it worked even during updates or restarts.

Disclaimer: I passionately hate Atlassian products, but I don't feel like using Stash/Bitbucket is a bad choice in any way.