The last Map Folio I bought from Paizo was the one for their first adventure path in 2008. Was I in for a surprise - production quality in terms of: paper used, has gone up a couple of notches. Really impressive.
That apart, there were two let downs.
First, as another reviewer observed, the creases along the folds mean that some of the color on the print has worn off already on arrival. I wish Paizo could look into avoiding that in the future.
Second, both the colour scheme and the actual art cartography (for mountains and especially forests) comes off as a lot poorer than the old maps. Looking at the old Varisia map in that first Map Folio, or even the World Map in the previous Campaign Guide reminded me how much I loved that artwork. Subdued colours, art used for forests and mountains wonderful - and evocative all round. Think back to when Lazaretti did the Greyhawk map panels in Paizo's Dungeon print run - superb art cartography. This, otoh, doesn't come near.
Finally, what felt really cheapening was to place the "Pathfinder Campaign Setting" logo totally oversized on the map top. The setting has a name, so if you're going to put that on the map, use that name (Golarion). Imagine how put off customers would be if previous maps of the Forgotten Realms would come with OVERSIZED logos of "DUNGEONS AND DRAGONS !! 11!!". It just doesn't fit. Looking at a world map, I want to retain a marginal illusion that I'm looking at a map, as the GM, that one of the people in the world could also behold (say, a central agent in Absalom). That illusion is broken because it says "hello! I'm a GAME supplement!!" right at the top.
Well, that last beef was minor compared to the previous two, but I wanted to point it out nonetheless.
Overall: better paper than the 2008 cartography, but a deterioriation in all other quarters. Actually has me reach back to the one which says "Inner Sea Reigon".