The best ink for tribals is?

Hello im wondering what ink you guys faind best for tribal work. There are alot of inks out there that promise that they are the best so i thought it would be best to ask befor i buy. Has anyone tried the ink 'ONE' http://www.painfulpleasures.com/xcart/wholesaler/product.php?productid=2484&cat=330&page=1 Can't wait to get some feed back! Thanks in advance//Mega

..........BLACK INK.........