Avantages
Oracle is a retirement home. The majority of its employees are completely checked out and are in semi retirement. A 11 - 3 workday is commonplace. For folks who want to get a paycheck without doing any work, this is the place to be. The gym is pretty good and six cafeterias at HQ means that you have plenty of choices for lunch. I recommend building 600.
Inconvénients
Oracle is extremely political, if you expect to be successful on the basis of the work you have done this is not the place. If you have reached Oracle via acquisition, good luck! Expect your former product to die a slow painful death. From an engineering perspective, this means no new features, just integration hell. If you don't want to become a vegetable, get out as soon as you can.