I agree with HeelX. I won't use AckStudio because of those features:
A Panel editor
A Shader/Material Editor
A smallweight Image editor so you don't have to start up Photoshop for every small change.
Level and Model viewer (using the C# Wrapper)
But because of AckSense and a good Project Manager. Maybe for the first release, don't add the features above. (You could also create another version beside express with those features)