Pros
The headquarters office has great energy and vibe. The BI tool is extremely sophisticated and they make sure you are properly trained and experienced to drive clients throughout their challenges, everything according to your delivery level. It's great for networking and knowledge sharing, also, spending a stint here will help you to add that to your belt in case you want to open a consulting practice, there's far more demand than supply for quality BI consulting.
Cons
Pay is simply miserable. There is a total lack of merit-based culture. If you work on a H1B, get ready to be subject to slavery for the next 10 years since they don't sponsor EB2 applications under any circumstance, it doesn't matter how many time you have preserved or extended business for them. Extremely poor management, there seems to be a huge disconnect between what happens in the field to the perception from upper management, therefore, always missing the point in strategic decisions. The Services team has shifted from being a strategic - elite - $250/hr or more very select team to a body shop that sells you at whatever price to keep the clients happy and pays you no respect. From being somewhere close to McKinsey it now looks more like a body shop (ie. TCS, Polaris, Infosys)