Engine wise I'm still all stock.
Runs great as long as you vary the speed up and down, but hold it steady for very long and all the sudden like you lost a cylinder. Shut it off turn key to acc.and let pump and gauges cycle then will run great.
Main reasoning behind tuner thought is they seem to calm down the sensors including misfire from a belt slip. Fuel pump o-ring if nothing else it's good cheap preventive maintenance but can also cause misfiring codes if I'm understanding fuel threads.
Like I mentioned before, I'm pretty fortunate so far as I can run around the mountains and you can't tell a thing is wrong all weekend, it's mostly running around town it's a PITA.