We're planning to start using Email editor 2.0 but a bit worried before switching. Did you have any trouble accessing the templates you previously used once you made the switch? Did you have to get anything recoded, or did it automatically work?
Some advice would be highly appreciated. Thanks in advance!
The good news is you can always switch back, so I would test and try editing a few templates. I would say simple layout templates will be fine, newsletter and more sophisticated layouts will definitely require testing. Also use Litmus.com or email on acid to test.
This article from Alok is very helpful: Marketo Email Editor 2.0 – Insights you should know!
I'd also advise reviewing Grégoire Michel's post here Upgrading to the new email editor 2.0: a recommended migration path