For Windows users that always keep one eye on their resources, this is a cool client to have. And with its freeware status with the release of version 1.22, this is one background mail checker that's hard to beat.
Pros: Background mail checker that uses a minimum of system resources
Cons: Doesn't read mail — many users will find it easier to just use their mail client, dated feature-set and interface, no longer developed or supported
