Myself, and a cohort of 30 other MSGIS students at CSULB all did an entire class last semester with Pro.
Overall, what we would like to see is a "classic view" option for the GUI. We all prefer the tool bars that can be undocked. Many of us like to move them close to whatever we are working on for economy of movement. A classic view option would offset the hesitation to change. Maybe it could retain some features of pro like the ability to resize windows, but it would be a familiar GUI that we could start using in a productive manner from day 1.