It would be great if people can add notes, or maintenance information about a specific zone or just the system in general to update information like, replaced diaphram, replaced heads etc to keep track of your irrigation system.
Your lawnscaper/irrigation guy can add to it, and see the existing notes for the system, if you would give them access to it.
And yes, you could store this in a word file or something, but it would be on so nice to have it all together in one.