Beautiful books for the Family history. I chose a burgundy one for the maternal line and a blue one I already had for the Paternal line. The A3 sheets are perfect for 2 A4 or 1 A3.( both sides= 4 A4 and 2A3 in total) The white separating sheets are a good idea if one is displaying original documents. They help to stop any sticking. Really good for creating a professional finish for exhibiting your family history. I used the courier service modestly priced and came the next day. The recipient of my work received the 2 books as a gift for a special birthday. I can report they were totally over the moon with the finished products. The Only downside was that the family history information and documents did take a substantial while to insert into the A3 sheets. You definitely need to allow plenty of time to enable you to do this task. I used ordinary A3 pockets for some of the work that did not require the acid free content. Perhaps S and N Genealogy could sell ordinary A3 sheets that do not require the more expensive acid free version. If they matched their acid free counterparts the result would be a better more professional finished product. It can be very pricey if you use acid free for the whole book and totally unnecessary for internet printouts.