On the other hand, when items aren't available from the standard sources, they'll keep right on looking, saving you some time and energy. I will be constructing a document retrieval page for LLRX , and would very much like your input. I really used to hate trying to find non-legal journal articles. Pre-Internet, it was much more difficult to know who had what, and how to get it. But I've changed my tune.
Document retrieval can be fun.
No, really, I mean it. When you've got the right tools at hand, it's a little like a scavenger hunt, and the possibility of success is high. Not only that, it can make you a hero, and everyone likes being a hero. I once tracked down a journal to the Society of Engineers in London. After a productive e-mail exchange with their librarian, the item came my way via fax.