Pros
You get a lot of responsibility early on in you carreer which really allows you to grow. Also almost all people in P&G are intelligent which makes working a lot nicer and easier. Also, in general people are very helpful with each other, i.e. just picking up the phone and calling somebody from another department, country etc. will almost always be a success, i.e. people will try to help you out with your request / question.
Cons
Unfortunately when it comes to carreer progress, things become less positive. The promotion rules keep on changing, and current new starters are victims to poor HR previously, where many (not always so good people) where promoted quickly, now creating a lack of opportunities for promotions. Also, promotions are not necessarily based on good work but more on 'show off' projects which are not always good for the business, but create the very overstretched word 'visibility' which is all that counts in the end. The ones who try to do a good everyday work and actually keep the company turning shouldn't expect any credit for it.