My mate has one, well the 3dr but mechanically identical. It's saab's own engine, not the later GM engines in the newer vehicles so it's agricultural but pretty reliable. That said, at 140k it should probably have already had a new turbo by now, if not budget that it will need one soon.
Other than that, they've got the usual Saab weirdness going on. Has to be in reverse to take the key out the ignition, ignition key by the handbrake, odd (to me) driving position etc. but they're pretty damned robust and reasonably economical (mates getting 45mpg mixed from his which isn't bad). Oh and the pixels die on the radio and air con display units, which can be infuriating trying to work out what's going on, but apparently it's quite a cheap fix.