I just got my copy of Sweet Days and I can confirm that it contains all new pictures. At most, there might be 4 shots from the digital pbs, but the rest are new. The making of dvd has totally new footage too and it's longer than normal (about 24 mins.). Mine came with an envelope with two Konkon collector's cards. On the back of the cards are jigsaw puzzle pieces that make up the image on the slip cover. I guess H!P is hoping the wotas will buy several copies so they get all the pieces.
Review: There are a lot of nice shots of Konkon starting from 5th Gen's group pb up to present day. I posted some in the picture section. There's a chapter devoted to each pb with an interview about her thoughts on each photoshoot in between. I would have liked to have gotten more shots of her in the sexy red dress from See You Again. We only get one new one, but it's really nice. And no new shots of sexy Konkon in jeans with wild hair from Natsufuku.

But, thankfully, the useless artsy-fartsy pictures were left out for a change. If you can only get one Konkon pb, this is the one to get. It costs a little more but it also has more pages than a normal pb. Too bad this is her last. Hopefully, the company that handles their Alo Halos will put out compilations too.
FYI - I ordered mine from Amazon.co.jp along with a bunch of Sals books. For a big order, they're a lot cheaper than Yesasia, even with express shipping. I received my order in less than 3 days, but DAMN IT!! they're packaging sucks. There was no protective bubble wrap or anything. All the books were loose and bouncing around inside. And the box looked like it was used to play futsal. Luckily, there was relatively no damage to the books, but I was shocked to find the Sals books don't come wrapped in plastic. They're exposed to the elements like a regular magazine. :evil: