Pros
Great place to learn the technology industry if this is the industry you want to have a career in. Great first sales job if you want to stay inside. Opportunity to make good money, some will make excellent money. Manufacturers will treat you well, buy you lunches, fun events outside of work.
Cons
This is an inside job. By inside I mean a cubicle, all day. If you can't handle that, don't work here. There is some opportunity for "outside" positions, but it is limited and highly competitive to get. Don't work at CDW if you don't want to be in the technology sales arena, if your confused about your life, go take a trip to europe or something if it will make you feel better. This is a place for young people who are interested in technology and making money. The chances of getting rich here are much slimmer than it was 10 years ago.