I liked the amount of CAD experience I gained using Revit, a program I hadn't interacted with before the co-op. You are trusted with a lot of actual projects and are able to visit sites to see the work while its being built.
What I wish was different
I wish I spoke up more and gained more responsibility in my position.
Advice
Always ask for more work and keep asking until you get it or some days will be very slow.
