I picked up one of the mangas from the Connect store with my initial credit since I was just as curious as you were if "they did it right." Unfortunetly I cannot say they did a very good job with end product. You can convert your own manga to the Sony format and have a better product; i.e., get the scanalation->bind with JE-Comics Convertor->run it through PDFRasterfarian or PDFRead. I've done quite a few this way and they are on par, if not better, than the ones from Sony (plus the selection is quite a bit larger
).