The solution is much lighter as an application server than other solutions that we have used before. We have used IBM Workshare Application Server and Oracle WebLogic. They are heavy application servers. JBoss is lighter. It starts faster and iterates its application quickly. It's much, much faster than the competition.
There's a feature in JBoss Enterprise Application Platform called MS queue. At some point, we were having some stability issues and it was very fast to find and detect the root cause. They released patches in order to fix issues and when they released a patch it fixed the whole thing, not just a piece.
When we had stability issues in our library, for example, JBoss made it possible to identify the exact library and update everything with a patch. With a solution like IBM Workshare it's not possible. You rely on heavy huge fix packs. It's not light or easy at all. JBoss is far superior in that regard.