I do not know what constitutes a great manager, but he has two league titles, one cl and another final. I won't say he is he does good transfers, and he definetly buys to many mediocre players. However has has a deficit of 65M £ from 2004-2010 which is 10M £ a year. (according to
http://www.liverweb.org.uk/benitez.asp) what was ours this year alone ? 45 M? I'm not saying he is good, and the list has soo many bad players, but also Torres, Mascherano, Sissoko etc... However I do think it's possible to arrange a solution, that limits the buying of all that shit...