I started using Flash CS4 for around a week now and I have to say that I love it—for the most part. There are a few quirky bugs, for example, the app will crash instead of closing occasionally. Overall I welcome the new features and tools.
The one thing I can’t get my head wrapped around is why in the world Adobe would remove the integrated Help system and replace it with a link to their online help documentation. While I see the benefit of online documentation being simpler to update and/or amend I can’t help but to hate this change. The Flash CS3 Help panel offered efficient access to the ActionScript API’s.