I have a 2015 3.6R. I did the RSB 20mm upgrade.. My rear diff was replaced (took 3 months), and I have been thru 2 wheel bearings. I'm at 40,156 miles. The build quality of the car is subpar. I miss my 2006 Legacy, I would still have it, if it didn't fall victim to the common head gasket problem. After the 5k engine repair it wasn't worth waiting for it to blow up again so I traded for the 2015. My 06' drove like it was on rails. The 2015 is a joke on the highway. The car is all over the place. The only way to fix it is to get a different car. I'm stuck with this POS for the long haul, so I deal with it. I stopped writing posts about it because as you probably have noticed hardly anyone will agree with you. Oh yea, I have also replaced my tires. My 1976 Rabbit and my 1970' & 73' Beetle all drove better than the 2015. A buddy of mine has a 16' Outback and his car drives fine. My sister has a 17' Forrester and that drives fine. Maybe it's just some of the Legacys that have this issue. Subaru isn't the best when it comes to issuing recalls.. There is no stupid learning curve to electronic steering either. The car is twitchy and loose on center and it sucks. I'm done.