Pros
If you are into enterprise organizations, Dell is certainly large and has all the trappings that a large international corporation has. There seem to be plenty of internal opportunities and as with all large companies you must actively manage your career. However see below for the things where I think Dell is lacking.
Cons
The services business is amateur hour. Business focus and goals are just catching up with where other organizations (Like HP and IBM) implemented 10+ years ago. Senior management, in services, seems to be a old-boy network centered in India. While the remote workforce is growing, support for remote works is very poor. The infrastructure is not suitable for the workload. The laptop image is unstable and contains application versions that do not work together. And IT support is slow as they are also overwhelmed with the volume.