I liked the people. The work I was doing was somewhat administrative in nature, but I believe this is because I was a summer student and people were not willing to invest as much in me. I also felt that they maybe thought summer students didn't know anything but I came with 2 years of oil and gas experience.
Lack of responsibilities.
Don't let a manager lead performance related activities when they are not the person who will be assessing your performance. My review was done by my manager who never oversaw my work, while my lead was very active in coaching me.
Have fun and ask lots of questions! People are very willing to help, but the nature of summer student roles may limit your experience.