Pros
UPS will invest in your training; for someone fresh out of school, it is a good place to develop solid Excel and Access skills that will help you throughout your career. UPS is also good in terms of work/life balance. There is a gym onsite at the Atlanta corporate campus that offers an excellent variety of classes for $25/month. It is also acceptable for people to come in later or leave early occasionally due to family commitments. I experienced a death in the family while at UPS, and my boss encouraged me to take as much time as I needed to grieve. If you are happy with where you are in life or ok with making very slow progress, it is an excellent place to work. UPS also extends health benefits to domestic partners which is pretty progressive.
Cons
It is hard to advance at UPS. If you are ambitious, you are probably better served working at a company that is experiencing rapid growth. UPS is very stable, very slow to change, and painfully slow to recognize top-performing employees, if at all. People are treated fairly - too fairly if you are a top performer. 3% cost of living increase in a decent economy is pretty standard. If you go the extra mile all the time, the best you'll see is 4-5%. UPS also likes to advertise its benefits, but look at the fine print. While it offers tuition reimbursement, it is capped at $5,250 a year (if you take a full courseload). UPS no longer does 401k matching for employees under the defined benefits plan (not sure if they do 401k matching for new hires). Every year, the health benefits get more expensive and less comprehensive. That is hardly unique to UPS, but UPS has a reputation for providing excellent health benefits, but if you are not extremely careful about what you let doctors do, you will still get ridiculous bills. The culture is rather stodgy. The company does not get the mindset of young people. There are not a lot of women in powerful positions. This is purely a guess, but I'd say that 90% of the people in the corporate headquarters are white men over 40.