[theschreon]

Sometimes the underlying processes an application is designed for are too complex to be self-explanatory. Look at e.g. Photoshop, would not work without tutorials.

[pistoriusp]

Photoshop doesn't have overlay help such as this.

I'm not arguing against any help, I'm simply stating that if it's easy enough to explain with an overlay then it's probably possible to make the interface intuitive enough without it.

[ako]

iPhoto on the ipad has overlays. Same sort of app, focus on usability, on a usability focussed device, but still overlays are needed...