Pros
UBS treats its home office employees very well, even in times of trouble. Rather than conduct arbitrary layoffs, the firm decided to offer voluntary buyout packages to all employees (those in certain integral functions or on particularly essential projects were excluded). I took one of these packages, with a promise that I could someday return to the firm if there was an appropriate position for me and the company was in a position to rehire. Sure enough, the firm has many current employees who are former employees, so this is true; the company does put its money where its mouth is.
Also, communication from management is exceptional. The head of US wealth management is candid, honest, and as straightforward as any line employee could expect or hope for. I remain a big fan of his, and hope to work for him again someday.
Finally, the benefits are terrific. Four weeks of vacation to start is nothing to sneeze at, and the firm picks up 75% of healthcare costs. Holidays are driven by the stock market, but we were often dismissed early on days the market closed early. There is no shortage of classes offered onsite in order to further one's career development, and if you can make a job-related case for it, the firm will also pay for you to take a Series 7 prep class and for you to sit for the exam as well.
Cons
For me, it was more about the commute being too long (4 hours roundtrip) than anything else. Also, I did not particularly enjoy the role I had at the time I left, so I took the buyout in hopes of finding something else more commensurate with my career goals and desires.