Pros
Some people are really good to work for but these people are extremely rare! One might argue that there is some brand equity as it is one of the Big 4 - all I can say is that it is a lot more glamorous on the outside than it is on the inside!
Cons
Everyone below Manager is a junior resource! Salaries are the lowest of the Big 4, in most cases not even comparable to mid-tier firms. Professionals with two qualifications command a premium at other firms, at KPMG you seem to have to settle for even less! Professional subs are not paid as supposedly our compensation sufficiently covers this (really?)! Double whamy if you are in tax as you have two prof subs to pay (makes it worse when the firm charges clients a premium for your dual qualification)! Work life balance? What is that? Extremely long hours - which aren't appreciated. Politics. Progression is restricted to those who know how to play the system. Constant flip-flopping when it comes to strategy and vision!