Glassfish 4.0 with Hibernate JPA stable? Nope, see: https://java.net/jira/browse/GLASSFISH-20716
You need to go for JPA 2.1. But there is no stable release of Hibernate supporting it yet (https://hibernate.atlassian.net/browse/HHH?selectedTab=com.atlassian.jira.plugin.system.project%3aversions-panel&subset=-1)!
Well, what can I say, I was disappointed as well. Unless you do some non-production code, feel free to give it a try with 4.3.0 BetaX. Otherwise, have some rest and cross your fingers for Hibernate guys or look elsewhere.