Pros
If you work hard consistently, there's room to grow in the Chicago office. Other WG offices may hand out promotions more often, but they're not always deserved. Here, the quality of work you output really counts. Going "above and beyond" is noticed also! WG is global and has offices everywhere. Transfers and cross-office promotions happen every now and then so the career opportunities are existing and possible in some cases. The benefits are definitely good (match on 401k etc.). The office is super conveniently located as well, near public trans. There's employment stability here as well, which is not always the case in this industry. QA are full-time, non-contract employees with full benefits. None of this "6 months contract then we throw you out for a week and hire you back so we don't have to give you benefits" stuff here.
Cons
This is not a con per say, more of a warning - but this isn't the place for you if you don't plan on pulling your weight. This is not a place where you can watch Youtube for hours, put in minimal effort, and go home for very long. Good work ethics required.