Pros and Cons of Communicating with Electronic means versus face-to-face

For one of our lessons in our graduate class, we had to use only electronic communication to work with our partner.  I am now suppose to talk about the pros and cons of doing this.  I can honestly say that I did not find any cons.  Yes, I did not get "immediate replies" like I would have if we were talking on the phone or meeting face-to-face.  I did not find this much of a problem.  My partner replied very quickly to emails I sent to her.  I thought this worked better because I did not have to wait until she had time to answer my calls.  If I thought of something I needed to ask her I could email her at anytime that was convenient to me.  I didn't have to wait and risk forgetting what I wanted to ask.  So in conclusion, I would say this method worked very well for us.