Not very difficult - looking for long-term investments for co-ops so they want high grades and experience at about the competitive student group level is likely required. That being said, you do not need a previous engineering internship to land this one

Met through a recruiter at a job fair. Had a follow-up interview with the same two guys a day later. I heard back around 3 weeks ago that they wanted to schedule a final interview. The final interview was over the phone and very brief, just wanted to know about your interests and where you would fit in.