Another benefit in using multilog is that I can (and do) send package-specific log entries to a separate log file. This allows me to look at just the messages related to the package/module that I'm working on at the moment without having to weed through voluminous non-related log entries. There is some setup and a small amount of coding required to do this. For me, it's worth the trouble. It essentially involves adding a unique prefix string to messages as they are logged, and then using multilog to stream these prefixed messages to a separate file.
If there's interest, I will provide an example of this type of setup.