I like that it can be used with multiple mail accounts and different browsers such as Chrome or Firefox etc. It's easy to use and set up. You don't have to worry about any of those "gotchas" you sometimes get when using other anti-spam products because this one is great! There are no downsides. This program works well in protecting my emails from being flagged by the major providers. Sometimes I will receive false positives but they're usually very minor issues which I can easily resolve without having to contact support. We've been able to reduce our bounce rate significantly since we started using Spam Bully.