One thing that drove me nuts about programming with Spring (.NET, in my case) was that it was so hard to follow the flow. So much flipping back and forth betwee

One thing that drove me nuts about programming with Spring (.NET, in my case) was that it was so hard to follow the flow. So much flipping back and forth between the config and the code. Also, the error messages for misconfigured applications were frequently inscrutable. This was addressed to some extent with a build phase that verifies the type names in Spring configs. Lastly, more than once we were bit by defaults, where an object that should have been a singleton wasn't, or the reverse. Lots of power to shoot your foot off.