CRM migrations/implementations for clients?

[ashahhubspot]

Education Partners, 

Have you ever done a CRM migration or implementation as part of a class? In your experience, what was the hardest part of that process? 

I recently joined HubSpot Academy as a Partner Professor, and I'm trying to understand how our agency partners work with customers on CRM projects. Since a number of you are both Education and Agency partners, I thought I'd take this opportunity to learn from you. 

Thanks! 

- Adi

@jgueron