Outside of what's in overview the adventures are set over a relatively short period of time (2-3 months). This wouldn't be much of a problem except that the set of adventures as is have a fairly large level spread (2-8). This may be too fast a leveling rate for some people. I found it best to up the challenge of the easier ones and bring in a more developed party.
Other then that this module is quite fun. The PC's failure can have serious repurcussions and is great to give your players that feel of really setting something right or seriously causing a lot of trouble.