Best aspect was definitely the people, the benefits were also nice (not having to pay for meals, etc. was a big help in terms of $), the structure of the internship was great (they did a ton of intern events and tried really hard to help us meet other people in the office, explore the city, etc.)
The amount of work was definitely not something I enjoyed. I often worked until 11pm, midnight ish, and while that is certainly not bad compared to some other jobs, I found it exhausting and didn't really enjoy it. The travel was also difficult - I was traveling to Puerto Rico and leaving every Monday and returning every Thursday, and while it was fun/doable for the first few weeks, by the end I was pretty exhausted and shocked that the rest of my team had been doing that for months.
Advice to Potential Interns
Definitely try to learn as much as you can about the actual cases that people are working on. People often think about consulting in general and theoretical terms, but in order to understand whether you'll enjoy the job/the work, you need to just ask as many people as possible what they actually do on a day to day basis.
Sample Interview Questions
Most cases are pretty standard - how to fix falling profits, whether a company should enter a certain market, etc. Most of the fit questions were also expected - name an experience when you felt like you failed, why consulting and not x industry that you've worked in previously, when have you had to make a difficult decision, etc.
Advice to Management
Honestly, not much - I think the issues I had with BCG (e.g. hours) are more a problem with the industry rather than BCG itself, and I don't blame BCG for having to work late some nights - it's expected with the job.