Jami...well one disadvantage would be that if u want to do the entry test...go early as possible because then you will be able to join the academy and get lots of practice for the test..where as august will not do you much good..because the test usually happens in late october...i knew my neigbour she left left as soon as she finished grade 12 and joined the acdemy..and passed the entry test..or if you have the books already then u can study on ur own...but joining the acdemy would be a GREAT option!