I have had the 'collect' series before and have just taken the opportunity to buy a newer edition. Never had a problem with SG books and this is no different, There are a number of revisions including price updates SG revised number systems for Machins and updated images and footnotes for regionals. All the little tick boxes are there as usual so I can have hours of fun transfering my list over and can now carry this book around to fairs so I can keep a full record on me when I'm in a buying mood and dont want to get any duplicate stamps.
I would class this as the perfect pocket reference book.