The mentors were great. They allowed me to work on things on my own and develop skills without being overbearing. I was able to get advice from my mentors, experience multiple aspects of engineering, and even got the opportunity to present my project to the head of the R&D department.
What I wish was different
I don't think there is anything I would have changed with this internship.
Advice
Keep asking questions whether its related to work or not. There are people from a wide varieties of backgrounds and I got to learn things related to work, school, and even leisure things.