Question about a Volvo
 

My sister is buying a 2001 S80, I was just curious what she's to expect if she buys this. It has 180k Miles, mostly freeway due a commute from Tucson, AZ to Phoenix, AZ. Hoping someone can help me out to keep her fairly informed about the vehicle.

Knowing little to nothing about the car, I only know early models had trouble with the transmission, but I was wondering what kind of trouble as well as what other issues may arise from the car.

Any help is appreciated!
Kyle