Pros
The eBay name will look good on a resume, there are professional organizations you can join for networking and workshops/seminars you can attend for professional development, free gym and shuttle rides. Easy commute if you live in the south bay. Salaries are competitive. If you are proactive and take initiative and have a manager that cares about your development, you can move up (but usually takes at least 1 year before you can change roles/title)
Cons
Too many layers in the hierarchy, male dominated, teams often work in silos and don't know what else is going on outside their area, not all employees are knowledgeable about product offerings and it's hard to know who to go to if you have questions/comments/suggestions. Lots of internal politics. Doesn't seem to be very innovative compared to competitors and change takes a long time to come about.