I'm a big scrapbooker gal. I bought most of my stuff last year in WDW. At the place you mention(World of Memories), there wasn't much there but I did buy stuff there.
I bought most of my stuff (meaning, scrapbook album, special packages for each theme parks - Epcot, MGM, MK & AK, additional stickers,... that's about it). I think it was well worth the price. OK it's 14.99 each pack but I have some leftovers that I can use for this year's. Some were on special for 7.99 a pack.
In the pack you have:
-border stickers
-2 or 3 pages of stickers (wonderful)
-neat colour pages that match the stickers theme
-paper frames
-1 or 2 vellum pages
That's my experience. OH! I forgot to say where I got this..hehe
It's at DTD... not in the World Wide Sports one...but the shop where you have everything Disney... I don't recall the name of it.