I have had the 2015 Sorento for one month now. I have not gone far with it other than driving it home from Victoria where I bought it and one trip to Brooks' in Shawnigan lake. It is running perfectly and behaves like a new car. It is getting 8.8 Litres per 100 Kilometers which is 32 miles per Imperial gallon or 24 1/2 miles per American gallon. Everything about the car is great, it is comfortable, easy to get in and out of and drives well. The electric steering takes a bit to get used to and I wish I had a backup camera as the view to the rear is a little lacking so I might add one if I can decide where to mount the screen.
It came with a full tank and I have added one full tank. I have tested it on gravel with a short trip to Brown's Bay and (not that I needed the AWD) I tested it. I have driven hundreds of thousands of kilometres in company 4 wheel drives and the AWD and it's Traction Control is a little different but I will get used to it when we have a little snow.
But so far, so good. No complaints and it is so much easier on the back than the old Mazda!