There isn't an early entry pass. This is a perk that is available to guests that stay at a WDW resort. If you're staying onsite, you can take advantage of EE. That's one of the advantages to staying onsite.
We take advantage of EE for several days each visit. For us, it works out well. It really depends on each person; if you don't like getting up early on vacation and would rather deal with crowds than get up early, then EE is not for you. But if you hate waiting in line (like us!) and would rather get to the parks early to enjoy some time before the crowds arrive, then EE is a great idea.