This car is a highway rocket. Not much to write home about until the high pressure turbo kicks in in 3rd gear, then you are thrust forward very quickly. The 9-5 is solid as a rock on the highway at high speeds, however, the steering is slow and doesn't transmit a great deal of road feel. The suspension won't get upset at high speeds but feels a little loose and sloppy over choppy pavement. Overall still lots of fun on straight multi-lane or winding country highways.
Like all Saabs, the 9-5 is very safe and comfortable. It has been a very practical car for our young family... lots of passenger and cargo room. Great stereo. Much better driving dynamics and economy than an SUV or minivan without losing much space. One of few wagons available with a stick shift. Horrible depreciation is your gain when buying used (best used European performance car bargain).
Very good winter car. Starts, clears windows and heats up fast. Not as good in the snow as other Saab models I've driven, but is still better than average.
Ideally, to own one of these, you should be an automotive enthusiast who is willing to work on the car yourself, locate affordable parts and deal with the one (typically) place in town that knows how to fix Saabs. Non enthusiasts will get taken to the cleaners for repairs.
The jury is still out on the long term reliability of this car, but I really like it.