We bought this Car new in 2010 and put 91,000 Highway miles on it prior to trading it for a new Infinity. It ruined us for any additional General Motors' Manufactured Autos.
This Model has really good space, a comfortable ride, and good power for a V-6 with acceptable mileage of 22-24 MPG Highway. The problems were in maintenance and repairs.
The first month we owned the Vehicle, it was in the Shop three (3) Weeks w/ a Manufacturers defect in the right, rear torsion bar in the suspension.
The Engine Compartment had a loud "whine" which the Dealer's Service Mgr. stated was "normal" and I found the Power Steering Reservoir was empty after receiving the Car back from the Dealership. The Rear Lift Gate collapsed on my Wife's head when the Hydraulic Motor failed and had to be replaced.
All-in-all, I would not recommend the Acadia to anyone, new or used.