Well,

are u planning to do on 2008 or 2003?? Well, it took me a while to complete MCSE. I failed 290  and 91 2 times...!! then in 3rd attempt i passed!! the most difficult is Active Directory 70-294 and Network Infrastructure (must be 290/91) . I forgot the exact exam numbers. in 294  and 291 simulations are very hard. you neeed to have a thorough understanding of technical know how!!

it took me 2 months to pass all 7 papers (even i had some 3 years of experience on win2k server and windows 2003)