@Brett I don't have any concrete figures on how many Hibernate users are using HikariCP currently. We've had questions on our Google group, some StackOverflow questions/comments, enhancement requests and bug reports from Hibernate users (all resolved). But after addressing initial enhancements/bugs after introducing our ConnectionProvider it's been relatively quiet on that front. There are currently no known (open) issues with the pool itself or the Hibernate integration.

We've never had a reported deadlock or livelock in the pool – but we've often induced them in other pools during load testing. We're also working toward becoming the default connection provider for the Play Framework.