Pros
I was part of an acquisition. Since I work from home, I have to say there's a good work/life balance. Benefits are probably as good or better than most high tech companies. My former company's organizational structure remained intact after the acquisition, so it's almost like still working for my old company, but under a new name.
Cons
The performance evaluations are a joke. Lots of hype, but little substance. Same goes for Development Plans. Because Acquired companies remain partially intact, if you didn't like your previous company, you won't necessarily be any happier once you become acquired by Oracle. The IT Bureaucracy is the worst I've ever seen. Trying to get help for a PC issue is hopeless. You're forced to log a help ticket online, and you may never get a response. Forget about picking up the phone to call someone for help.