I have all three based off over more positive than not review notes here at EN World. Haven't read every word of every page, but I got a jist:
Monsters are all OGL, so some DMs may want to spend some time replacing the critters therein with some newer beasties for variety.
Many missing maps, all of which eventually made it to Mongoose's website as free downloads, so that's forgiven (but sloppy).
Not easily adapted to an exsisting campaign world. It comes with it's own world and flavor and while it could be converted the work necessary would be extreme.
The adventure hooks, writing, and ideas are all quite original and a real joy to read. The adventures are never stock, filler, or typical, and there is a definate LACK of railroading. There are even loads of non-combat encounters!
I like it, and can't wait to run it.
-DM Jeff