Pros
It's all relative. If you compare jobless to working at Q then of course it's better to have a job. So the pro is at least you have a job. If you don't want a long term career, don't want to be properly rewarded for your time and effort, don't want a interesting job, then it is good for you.
Cons
Too many. First of, they have many of their people leave good feedback here to cover up their terrible biz practices. So I would go to other websites and/or get hold of real people working at Q for more accurate info. Overall, don't expect a long term career since the good spots are already occupied by chinese and indian people who are horrible at mid to sir management. Dont expect to get rewarded properly for your time(a LOT of your time) and effort, and when it's time to let people go you are most likely the first since they protect the people in their small circles. They also hire many H1B to replace Americans and/or old people. It's still a bargain to hire young fresh H1B at even the American workers' price since they work extremely long hours so company get huge investment return out of them at the same price, and American workers simply wont work 60+ hours weekly regardless of pay. The reason why H1B work extremely long hours because Q threatens to not petition for H1B their green card unless they work extremely long hours so Q can get much greater investment return, and therefore there is no reason why they want to hire American workers even at the same price. So Green Card IS the ultimate leverage Q has against H1B and highly qualified American tech workers who can't find jobs taken by H1B.