Just because you use a wizzard or maintenance plan to run jobs does not mean you should stop monitoring your systems. Even if you run your own scripts you should still monitor them. Running out of space can happen no matter which option you choose. Notifications can be set up either way as well. Problems occurr no matter how a job is set up. I don't think this discussion is about how jobs can fail, I think it is about whether we think maintenance plans can be useful to use and if they provide the functionality that we need.