I didn't explain what it does very well. SL helps you plan a shooting day - or days. You list what shots you plan, how long they might take, gear needed, etc, etc. Oh, and it's $10!
So it's not really like CS6, which allows you to list stuff after you have shot it. Personally, I think FCPX is the best for that. The data base management is great for fast sorting and retrieving. Just MO.