We've had tons of service problems. Volvo keeps telling us it is because the vehicle is the first year for the model. The vehicle absolutely cannot hold an alignment (we get it realigned every 3-6K miles) and burns thru tires rapidly (every 10-12K miles). Every time we have something fixed, a new problem emerges within 500 miles of driving. Lots of stuff (rear shocks, bearings, brake pads) have had to be replaced prematurely, and there have been many minor problems (stench from HVAC, radio malfunctions, etc.) on top of more serious concerns.
Built-in booster seat.
When inside the XC90, there is a surprising amount of road noise. If you turn the fans on, it is impossible to carry on a conversation with passengers in the back seat. This is a very family-unfriendly aspect of the car. Also, it is difficult to see to back up and the car does not beep to assist.