In 2011 I wrote about the Stanley Gibbons equivalents of the Scott Browns and the Blue International Volume One. Somehow I missed a thread the following year on Stampboards that describes collector Jonah's progress on filling the SG Imperial. (The Imperial covers the British Commonwealth 1840-1936.) There are lots of interesting comments and images, many of which are relevant to Scott International collectors. I still am having trouble acclimating to the lack of borders around stamps, but the completed pages do have a nice clean look. I suppose collectors who use stockbooks would especially like the appearance.
There is a new post on Stampboards that addresses the availability status of the Imperial. SG intends to update the Imperial along the lines of their King George VI album with similar 22 ring binders. Alas, nothing is mentioned about the Ideal album which covered the rest of the world. (Regency, the US distributor, still shows the 3 volume Ideal available for $499.)