I bought the WOL encyclopedia in hardcopy instead of as a module. It was a hard choice. There are some LONG articles that I wanted to be able to view away from the computer. I think several deluxe SS resources are just as good or superior to WOL for immediate clicking.
If I had been able to purchase WOL from the SwordSearcher site, I probably would have just bought the module, but after going through all the trouble of setting up an order through the publisher, I went for the hardcopy.
I have a pdf copy of WOL that probably is not copyright free. I don't know. The pdf is a bit awkward to use and I wanted to support the author of something I was using. Maybe someday I will purchase the WOL module, but for now, I think I made the right choice to get the hardcopy.