Stap
I am running the STAP for some Argentinian D&D players in Buenos Aires.
I have had a crazy amount of PC deaths. A lot of it is their own fault -- no one wants to play a cleric, no one wants to be a fighter. A Beguiler, Warlock, Dread Necromancer and Wizard have a rough time staying alive.
Yet, some encounters just seem unfair. My most recent PC death was the beguiler, who was eaten by a T-Rex on a beach, which beat him on initiative, charged and bit him, then made it's will save versus the beguiler's only spell cast prior to being consumed. I'm really not sure what the player in question could have done to avoid this. The rest of the party either scattered or died, and the T-Rex ran off (it was only going to kill more PCs), so the PC is basically unrecoverable (not that they have access to any ressurection magic anyway where they are).
On the whole, I would say that the STAP is designed to be challenging but very fun for a bunch of math-inclined serious minmaxers. My old San Francisco group (a physicist, a lawyer, and several engineers) would totally love it, and probably do quite well.
But when you throw less cooperative, less metagamy less math-inclined players into its maw, it eats them.
Ken