Pros
I can honestly say that Dell is a great place to work. There are lots of opportunities to learn and grow as a person and as a professional. Dell is always looking for individuals that can propose better ways to do things, is always trying to improve. Is part of the Dell culture, they are not afraid of changes, in fact Dell believe in changing. Dell also cares a lot about work life balance and it has the goal to become the greenest technology company on the planet. Dell respects they employees and supports diversity, you can be who you really are in here.
Cons
As I said above, Dell is a great place to work. Unfortunately there is no perfect place. I worked on different departments and the Dell experience depends a lot on your direct manager. There are some great managers and other not so great. this can also happen any other place, but I feel is really hard to do something about it here, because your manager approval is needed when you decided you want to work on a different department or business unit. There is a survey where you can evaluate your manager, but it only happens once a year, so, if the manager receives a bad evaluation, he has a whole year to improve and sometimes they just don't try.