Easy to use and works.
rarcrack is a joke. The developer pooched the printf function such that the only way it runs is with the "--type rar" switch (it cannot detect normally), and the password generated is NEVER correct. I created an RAR with a password to see. It NEVER found the password, but dutifully spat out a password and called it good. That is a two hour span I'll never get back.
There are no 3 star reviews.