We stopped using this 3-4 years ago due to it being unreliable (by admitted by CL at the time) which I believe was largely down to the information being fed to CL from the product feeds.

The problem we had was simply that it would mark items as obsolete or do not order that weren't supposed to be marked as such. What I think would help me regain confidence would be if we could properly preview the changes it is going to make ie if it could present a line by line list with product codes and descriptions with the option to check a box or remove an item that you didn't want removed for whatever reason. I think this would allow us to query items before marking them obsolete.