I've had my 5.7L for about a year and will exceed 25K miles this year. This is a well-made vehicle. It replaced my 05 F250 diesel. Now this is no F250, but I do pull 6000 pounds with it and it's pretty good. Without the trailer it's just plain fun to drive. Of course mashing the accelerator cost you lots of money because the fuel mileage is pretty poor. I'm mostly highway and I average around 16 mpg. The price I got a year ago was incredible. This is a whole lot of truck for the money. Only real complaint I have on this truck is the paint. It's very thin and scratches very easily. This is a common complaint of the Toyota Truck Forums.
Big engine is great.
I think Toyota uses a more "earth friendly" paint, which I'm guessing may mean somewhat water based. Not sure, but the paint is poor. Just looking at it wrong will scratch it.