It does include a different sort of review system though. Every app is built from source by the F-Droid maintainers and has a corresponding source code bundle availabile. This means that if you notice or suspect any shady behavior, you can review the code to find out the exact nature of the shadiness and alert people. Developers can't as easily claim that it was an unintentional bug that happened to accidentally siphon all private data from your device.
