 Couldn't be more reliable turn the key and go . This truck is economical when you drive it that way and it can be a rocket too .the 2015 suspension is taughter than prior years which gives it better high speed handling and better hauling abilities it has a fourth rear leaf like the newer model.everything you need nothing you don't.this is my seventh  Toyota a 2015 4wd double cab long bed with a 4 liter automatic definitely the best one yet typical reliability and really fine tuned ( being the last of this model  with the 4 liter and 5 spd auto )  after 45000 miles the suspension has softened up a bit while retaining enough stiffness for confident  highway cruising with a full load. Gas mileage with 10 PCT ethenol gas  is 16 city 21 hwy. The Dunlop tires had to be replaced at 30k miles. No repair issues whatsoever. Really well put together