IBM

There are a hundred pros in my experience.

Great people and office culture, great facilities, great growth opportunities; there's freedom to branch out in any direction you'd like, really. Very nice in-house gym and shower.

People love to help each other. You don't have to be afraid to ask questions about anything you're confused about; they encourage questions. In regards to mentors/managers, they are also really helpful resources who always try to make time to meet with you semi-frequently.

There's also pretty good leniency when it comes to working from home or taking time off, and lots of training opportunities. Great work-life balance.

If you're a new age, college senior/graduate software developer looking for exciting products to work on... I don't think you'll get much luck here. It was very dry and, what's the word, sort of archaic, as you'd expect of such a big, historic company.