Actually, I've found that there's some semblence of continuity if you play them in order... However, the ELs are variable, it seems.
Of course, the maps and keys don't match each other half the time, so you've really got to make sure you're prepared for some work.
Oh, and the characters will get MASS QUANTITIES OF TREASURE, sometimes with no risk. The one cleric is supposed to GIVE AWAY ALL OF HIS POSSESSIONS because you saved him. LOL
While it doesn't sound like it, I am enjoying this book. It just required a bit more work than I was expecting. Great format, though!
Chris