seeking advice

hi all... i'm planning on taking the 640-821 INTRO test in the next couple weeks... i've taken the 1st 2 semesters of the Cisco course at a local technical school (36 hours) and i had a B average for my online test scores... i'm very confident w/ subnetting and access-lists which i've been informed are the hardest part... i passed the voucher test w/ an 80 for the INTRO exam... i also purchased the Cisco CCNA flashcards and exam practice pack... i've been studying for a few hours a day the past couple weeks.... can anyone tell me how well prepared i am to sit for the INTRO exam?