When you want to manage your projects over months or years you definitely need some help to relieve your brain. Keeping everything present on your mind would be an overwhelming burden. As everyone you need help.
I've used the previous version for years. Now with the new 2012 version it's even better. Some pros:
Give it a try! And do nice projects ;-) It's so good we pay for two accounts: one for our family and one for Native French Speech.