Contacted by recruiter during senior year of college. Arranged two virtual interviews. The first one led to the second one because the interviewer thought he was interviewing for a Software Engineer position. Both interviewers were simultaneously professional and easy to talk with.
Prepare for your interviews - the questions they ask can very be difficult!
The recruiters I talked with - there were three total - were VERY helpful and professional. They were my biggest advocates.
Except for one incident where one of my interviewers never called me. I emailed my recruiter several times when they my interviewer hadn't called, but didn't get a response. I called, but got a voicemail. Halfway through the interview window I emailed saying that I don't have time to wait any longer and that we should reschedule for later in the day. (I had a class to go to!) When I got out of my class, I had an email from the recruiter that insinuated *I* was the one who missed the phone interview. That really rubbed me the wrong way, but I swallowed my pride and took the next available interview time, which was 2 weeks later. The next interview I had was fine.