Purchased a used (28k miles) 2011 Acadia in April 2012. Test drove and was tempted to buy a Toyota Highlander or VW Touareg but loved the body style and features of the Acadia.
DVD player broke after a week of owning it. Fortunately it was just barely covered under warranty.
A couple months later, at 300 miles past warranty the back hatch broke (wouldn't open manually or remotely). $600 to fix.
May 2013, a year after buying the vehicle we're on our 2nd time fixing the air conditioning (approx $1000/time), and there's an oil drip.
No other SUV in its class offers all of what we were looking for: a 3rd row, with captains chairs, and a reasonable amount of space behind the 3rd row when it's up, to haul a stroller or load groceries.