I have been working at Think Company full-time (More than 3 years)
I was cynical that everyone was drinking the Kool Aid even shortly after I joined, but the "core values" are legit, not just fancy marketing bull. They are taken to heart by the leadership and employees, and is very much a part of the culture and identity of Think. There's an inherent pride in sticking to and representing those core values to clients (especially to difficult clients!). There's even an award presented every Quarter to the person most voted for exemplifying those values.
The leadership is humble -- ego is just not a thing with them. They are easily accessible, transparent, and encouraging, not stingy with praise for individuals or the company at large when there's a win (big or small) worth noting. There's a whole #ftw Slack channel for just that purpose. Employees use it regularly to celebrate one another. It's awesome.
Unlimited PTO is pretty badass, although to be honest I don't take advantage of it as much. But that's just me. :)
This is not a company for people just looking for a "job." Yes, I'm listing that as a "Pro". Think is quite selective and ... well, thoughtful, about the people they hire, looking for more than just experience and skill -- they evaluate a person's character and personality as a huge part of the equation.
They're more likely to hire someone who is skilled and honest about what they DON'T know, but takes initiative expanding their knowledge, than a seasoned braggart who talks down to people and blames others for failures. :)
It's a great system -- people who exhibit the same values work harmoniously together, maintain the same goals for clients, and keeps internal conflict to a minimum, if at all.
Employees who work on-site at clients' offices don't get to really benefit from the in-house Think Company office vibe on the daily. The days that we do get to work in-house feels like coming home; everyone smiles and welcomes you like they really missed you.
I applied online. The process took 3 days. I interviewed at Think Company (Conshohocken, PA) in May 2013.
Met with a couple of people in a very informal, but professional interview. I felt more comfortable in this interview than most and it made for a great experience. I presented a concept for two designers and someone working remotely in their Denver office.
The team is made of senior members who clearly have consulting experience and know how to offer products and solutions for clients of various sizes. They may have a very selective process. I enjoyed the audition by evaluating a problem in the world and offered a concept solution presentation, explaining which parts I thought through and accepted feedback on parts that I hadn't considered.