There was a problem with them a couple years ago when changing from factory non-LED lights to theirs caused intermittent function even with their inline resistors. It was fixable with a J-scan or Tazer, which is what I did, but that is an added cost if not already owned. I wonder if it was ever fixed?
$299 is a good deal for these, but I don't mind the stock LED's. On my JLU, they were much tighter to the body and made an incredible visual difference. I don't know if these are worth the change on the JT. I know the reverse light is brighter.