PROS: These are ... wow. Gorgeous, really bringing back that homey old "dungeon crawl" feel. I'm actually surprised how much I prefer this look to the more modern "well-polished" e-Adventures style for old school fantasy gaming.
For kids' fantasy games, where you may want a single permanent layout to make games more friendly, gluing these to black poster board will make a wicked awesome gameboard.
CONS: This set is MUCH harder to use than geomorphs. Also, an errant breeze or a knock to the table will completely destroy the layout, while with geomorphs the layout could be quickly re-created. I'm more likely to print these on plain paper and glue them permanently, which is a bit wasteful.
A loooot of ink is wasted on the unnecessary parchment background, and the way it increases the overall image size makes it very difficult to scale the rooms up and down (for, say, 1.5" clickbases, or the slightly-bigger-than-1" bases required to fully base some Reaper figs).