Pros
Truly a laid back culture. You can dress however you'd like (unless you're meeting clients). You're given the freedom to take up projects, meet whoever you'd like (senior management is very friendly and welcoming). The people are very, very smart and Chicago is great. Good general business experience Great products.
Cons
First role is veeeeeeeeery entry level. You're either placed in their call center as client service support for their products, or you're cleaning up data as a data analyst. It's very rare to get hired as a research associate and EVERYONE is trying to get those jobs internally. It can be surprisingly disorganized. All the pros of meeting whoever you'd like, or attending any training sessions, go right out the window if you're in client service. Then you're on the phones from 8-5pm with a 1 hour break in between. If you want to meet someone or take advantage of a class, it better be on that. Management in certain departments are reluctant to hire MDPs because they'll rotate away, so they are hesitant to invest. Training doesn't exist. It's a "figure it out" type company. Technology MDPs make almost 30K more than non-tech MDPs. (Yes, tech MDPs make 75K). The company is very, very, VERY cheap. Food runs out at the "patio parties". Bagel Day is the only free food you'll get. And they don't freakin pay you! Don't be surprised when they only want to give you $500 relocation. The technology we get to work with is terrible.