Pros
Great place to advance your career, over a 6 year period I was promoted 5 times and each time given a role that challenged me to push myself outside of my comfort zone. The sales training is unmatched to any other company I have seen in the market. The skills are transferable to every role you take moving forward, and make you a better business person. Not many companies will not only allow but encourage young motivated people to sell to large, complex organizations. If you are looking to put in the time, listen to people that have been there before, and work hard to achieve results so that you progress your career this is the place. QAS will allow you to walk into your next job/role with such an advantage that you will get the role over others with double the amount of experience. For anyone who reads the reviews on glassdoor and sees any less favorable comments, I would caution you to take them with a grain of salt. Simple fact is that most people can't cut it here, it is for the cream of the crop. If you want a job that you do your 9-5, collect your paycheck, and go home this isn't it. Some people on here thought they were cut out for it but in reality they were not.
Cons
QAS is always about building a plan and executing to results. Where I would provide suggestions is to improve the follow through of such plans.