It was a wonderful experience. The supervisors were really friendly and they were really interested in making us learn. They made sure that we grew professionally and personally. I really enjoyed calling Alumni and listening to their experiences.
What I wish was different
I would love to meet the people physically whom I used to talk on the phone.
Even if you do not do good at the start, do not panic. Try different ways and make your conversation interesting. People only give you gifts(donation to college), if they like talking to you.