Pros
The only potential benefit of working as a contract employee with vaco is that you might be placed at a decent Google campus with free food and a gym. This changes seemingly at random and you can do absolutely nothing about it because vaco is spineless and will not stand up for you.
Cons
When vaco says "outlaws welcome" that means people on your team will be proud of having been fired from previous jobs and not being competent at their current position. In addition to this, you will have severely unprofessional and incompetent vaco FTEs, as well as Google employees, dealing with your project on every level. Getting rid of the problem people is incredibly difficult, even with months of evidence stacked up against them, because vaco treats you like a walking dollar sign and wants everyone to have a "job" so they get more commissions. You will not be paid a reasonable amount to live in Silicon Valley (or any surrounding area) or allowed to work overtime and will either need to live with five other people or take up a weekend job to make ends meet. Be prepared to eat all three of your meals on campus to save on food, use the gym, and shower there to save on gym memberships and water bills. HR at vaco is an absolute joke. If you take a job and decide to get health, dental, or vision insurance through vaco, be prepared to spend weeks, if not months, just getting in touch with your HR rep to find out that vaco has screwed up with filing your paperwork or found the weakest link at the insurance company to use as their account manager. Additionally, there's no COBRA option on the health insurance, so be ready to find your own if you quit, get fired, or your project ends. Your project manager and any vaco underlings will a. Not understand what you're doing; b. Not listen to the problems you have with the project or your team; and c. Talk down to you, even though you're the professional they hired to do the job well. Imagine getting on an airplane and finding out that the pilot isn't a pilot, just some schmuck that they pulled off the street. The rest of the airplane is full of licensed pilots with 10+ years of successful flying experience. The person flying the plane refuses to listen to the large group of actual pilots and calling ATC only results in a curt, "deal with it." That's precisely how a job, because this isn't a career, at vaco works. The best advice to anyone considering a "job" here is to turn tail and run. Sure, do the interview if you need to prove you've been trying for unemployment or just want practice being impressive, but don't take the job they're offering. Your health and self respect are worth more than the minimal money they're offering.