Met with them at a career fair and had an initial phone screening interview. After many e-mails back and forth I had two more interviews, one with one of the Principals and another one with the Vice President. They showed a real interest in me and offered me an in-person interview at the Austin office. I talked to two of the Associates and one Principal. My overall experience with BTG is that they are VERY new company (about 80 employees in the US) and they haven't figured out how the recruiting process works. At times it seemed a little unprofessional, the e-mails from the recruiter had a lot of typos on them. A week later, they sent me an e-mail saying they were no longer interested in going further with my application. After a month of interaction with the "company" it seemed strange the way they declined to make me an offer - very generic and impersonal.
If you are looking to grow with a company, BTG it is not the company for you. They are looking for college grads to work for them for about 2 years and then they lay you off.