It adds grain, curves and brightness adjustment, vignette, exposed film looks and more!
Here is a photo I took down on the beach a couple of weeks ago.
That's a 5MP JPG direct from the camera and rotated. I then shoved it strait into Photoshop and slapped on of the effects on it.
If I'm not mistaken, that was the Time Zero Expired one. Being and action it's not that big and there's nout to loose from installing it. Give it a go and see what you think.