Had a Tundra since 07, 0 issues, the only things I have done to it were plugs, rotors, brakes and tires. I'm at 130,000 now.
Yes the mileage could be better compared to the new offerings out there but I can buy a lot of gas for a fraction of what I would have to pony up for a new truck.

If I could only do 1 mod other than tires it would be a locker for the rear, the traction control stuff sucks