Vantaggi
Learned so much and met great people! Oracle is a large company with many different business units and opportunities to excel in. If you need a change just apply for another job in oracle internally and snap you have a new team and new project to work on which is easier than searching for a new job outside the company. The company is involved in databases, Linux, Middleware, cloud, etc so there is a lot to learn and soak up while your there as well.
Svantaggi
Oracle is ruthless in looking to outsource resources outside the U.S (cheaper labor) I have seen globalizations ugly side at Oracle as more work goes overseas and leaves the U.S, its unfortunate but leaves us in the U.S to fight to stay competitive for our price. The June "Hunger Games" are real! Let me explain, around June time is the end of the fiscal year and then projects and team efforts are assessed. If your team is not performing up to par or you personally you may want to update your resume just in case you go to the chopping block. Just make sure your getting good performance reviews :) Oracle is a large company and as expected your work becomes more partitioned into islands or "silos". So for example the networking team does the load balancing and network design, the ops team deploys the servers and manages them, then the dev team creates the automation, etc. So if you like startups and how you can change hats from system admin to dev, to network guy, you will miss have that option open at oracle.