I have a 2007 that we bought new. For the most part I love the car.
We get around 16-20mpg normaly closer to 16. I have one complaint about to much wiggleing with the drivers seat. But apperantly I'm the only one that notices it. I've taken it to two different dealers.
I have had a few minor problems, all that when I have talk to owners of newer models or the other GM equilants, the problem was fixed by a design change.
The one problem I did have which is a huge one was one of my
piston skirts broke off an fell down in the crank. GM did replace the engine at there expance. It was only in the shop for about a week and a half, so I did not feel like they left me hanging. Once they found the problem they took care of fixing it. But I could not beleave that a car with 36,368 mi had a piston skit broke apart.
My wife is the main driver and I have only used it three time to hall the sled north. But it does tow great and handles the snow and ice perfectly. The year we bought it we had a bad ice storm after Christmas and being on the fire department I had to go on some calls I took the Acaida to go to the station and had no problems. The AWD and traction control did its job perfectly.
For the the size and value of the Acadia I would buy another one. I wish GM would make a V8 model b/c it would help get it up to speed better when towing. But I think most car should be have a minium of V8's personaly.
Also here is a web site for you to look at
Acadia Forum
Good luck