I tend to be a bit flaky, so autobilling is a good thing for me. The main thing is that it means that I don't have to worry about being a flake, which is a major benefit -- my usual self-correction is that I need to worry about things a fair bit in order to actually remember to get them done. It also means that it does get done, which for something like this that's not worth a lot of worry, is also sometimes useful.