Brev00: Great software! I got it free a couple of months ago and use it often. It operates as a plug-in in Elements so is quite convenient. You just have to withstand all the offers for the full package.
Runs very slow on my Win 7 Dual Core 4GB laptop, then stops working as soon as I try to save the result. This happens in either stand alone mode or when invoked from Photoshop.
I don't think it gives me anything that Photoshop can't do anyway.
I agree with x100x, setting RAW looks like it overides any Size setting and defaults to L (12 Mp).
As an experiment I set M size first, then switched to RAW (which incidentally then blanks out the Size setting function) and compared this with a similar image after setting L size then RAW. Both images were the same file size.
After developing both images to JPG in Silkypix using identical parameters I couldn't detect any differences between them either in terms of resolution, noise or highlight recovery or anything else.
Apart from this I found this article very helpful.