Another reviewer has said that if you have the originals of these tracks then you don't need this. I totally disagree. As a long time SOS fan who has just shelled out reasonable money on the Vivo CD just to get the track Kiss My Petals Open (as used on the bonus DVD feature Opium Kiss) I can tell you that these tracks still have the lush, big warm arrangements we love. I had been lead to believe this was a sort of unplugged CD, but far from it. Updated, yes, inferior, no. In fact I'd like to see more of these re-workings as it far from invalidates the originals.
It sounds like the same band featured in the Tokyo Stories live DVD, so as a combination package with the CD it is a no brainer, get it while you can. SOS I'm sure would prefer to be a bigger success commercially, but those of us who have hungrily absorbed their increasingly sophisticated music over the years see them as a preciously kept secret. Long may they continue!