I just received appzapper as part of a bundle. The first thing i did is compare it with the 'Delete App' functionality of forklift. In each and every application i tried, forklift caught more files on my system than appzapper. Sometimes appzapper would miss out a file in 'receipts' folder or sometimes in 'caches' folder and sometimes in both. Considering appzapper is a program dedicated to this functionality, I am pretty surprised by this. If all application deleters out there were missing the same files then I wouldn't have been so harsh on appzapper. But the fact that another application catches extra files every time is inexcusable.