Good work been using it as an alternative to Github and Bitbucket for over 3 years now. We have a small team with more then 52 private repository and works good so far. Besides this we replicate all the upstream opensource repository and keep it synchronized in our own instance. This is done very easily as Kallithea supports both git and mercurial. We do pull request review online and merge it offline and then push the changes to main repository. Our costs is $10/month for hosting with unlimited users, unlimited repository and small update maintenance whenever a new release comes in.