I currently have a foot in Adobe Flex 4 concrete shoe and have been monitoring Apache Flex for some time. From a strategic perspective, it does not make sense to stick to a deprecated project and Apache is the way.  

This question is meant for SO community members with **first hand experience on making the switch**.  

1) Was it painful?  

2) Was it worth it?  

3) If you had to do it again, what would you do differently?