Pros
Structure, determination, strong corporate culture, vision. Extremely educational on every imaginable level, a training that is stellar outside UPS. If you've been at this company, it's a breeze taking on pretty much any other challenge. Especially so if given an excellent mentor/boss (which I happened to have).
Cons
Extremely political and bureaucratic. How about two-three months for ordering a lamp? Non-flexible. No room for real responsibility, there's always someone else who approves and decides which disconnects people from their jobs. Furthermore, people are not viewed as people, it's all about statistics and ROI. Poor pay compared to other companies for similar jobs. Reasons for advancement are unclear. It's pretty much all about knowing the right people and networking within the company. Management (including myself) are treated like royalties (how about planing a new lawn for a visit to one of the centers?) and are able to freely act as dictators creating their own little realm within the Big Brown.