For basic apps I guess it works, but you can just save yourself the $13 and use Spotlight.

For more complex apps (FCP, Adobe Creative Suite, Microsoft Office) AppZapper doesn't come close to catching all the files used by the target apps, so you're better off using Spotlight (all AppZaper found for Entourage was the app, while Spotlight at least found the Entourage files in ~/Documents/Microsoft User Data).

And I don't know if it's a flaw with the app or a design decision, but AppZapper doesn't seem to check for files outside of your user directory and the /Applications directory (in other words, it doesn't appear to look in /Library/Application Support/ or /Users/Shared/, where Macromedia and Apple put a bunch of files).

If you want to save youself $13, keep in mind that for apps by some of the "better" developers (like Panic), look for stuff in Applications/, ~/Library/Application Support/, and ~/Library/Preferences. Or just use Spotlight.

If you're trying to clean up apps that install files in non-standard locations, AppZapper won't do much good, I'm afraid. And how do you know if the app you're trying to trash installs files in non-standard locations? Good question. Unfortunately, AppZapper isn't the answer. At least not yet.

Con tiki, have you moved the apps from their default location? I did (I put all the "loose" apps into a folder called "Final Cut Pro 4"), and Software Update wouldn't show that I needed the update. When I took all the individual apps out of the folder and put them back into their default location (/Applications for most of them, /Applications/Utilities for a couple), Software Update recognized I needed the update.