Do be reminded that the latest jailbreak for ios5.1 is a untethered jailbreak..

Sorry... my mistake it's a tethered, or semi-tethered jailbreak.

anyone tried the jailbreak and done it successfully?

I'm having some issues with it.. everytime being kick out after entering DFU mode.. and later the iTunes started requesting a iphone in recovery mode needed for a restore... nothing can be done except going thru another round of restoration...