The five person team I was working with were incredibly welcoming and supportive. They immediately made me feel like an original member of the group. There was always a team dinner or someone to grab a meal with, so I never ate alone when traveling. The group of interns was also so much fun. There were only two weekends when there wasn't an organized social event to get together with the other interns and the associate consultants, so I had a good understanding of the firm/office culture by the end of the summer.
Because of how accelerated the internship is compared to actual full-time staffing, the mid-summer review can seem a bit...forced. Considering that the first week is spent in training and the second week is used getting up to speed on the case, it's really based on just three weeks of work. But it gives a decent picture of whether you're heading in the right direction or not.
Advice to Potential Interns
I was astonished at how seriously the firm viewed personal development goals. In my first week, I had separate conversations with both my manager and consultant to outline my goals for the summer. Within days they were taking me out of my comfort zone, proactively placing me in situations to advance and develop these goals.
Also, the partners REALLY CARE about the associate consultants. When I was traveling, one of the first year associate consultants fell ill to the point that it was questionable whether he would be able to fly back to the home office. The partner on the case cleared his Friday and weekend schedule to make sure that, while the rest of the team could fly back, he would stay with the associate. No matter what was being discussed in the team room, if there was an update on him, the partner wanted to know.