there is a thread
https://bitcointalk.org/index.php?topic=239665.0
and an user https://bitcointalk.org/index.php?action=profile;u=130960
it is impossible that you know if it is scam or no unless you test it
there is also some testimonials in the web http://www.walletrecoveryservices.com/testimonials.html
you have to remember something about the password and the fee is 20%...