Being a automotive tech and owner for over 30 years I was skeptical at first after reading reviews saying they are loose after install and that they done work after install I figured I would give them a try. I installed the led lights in my wife's 2013 Acadia and was pleased at the brightness compared to the old lights. The only reason I did not give a five start is that fact that the plug in for the lights in bi directional and will only work one way and not the other. So it requires you to plug them in to the cars head light harness and see if it works. If not then unplug it and turn the plug 180 deg and plug it back in. My wife reports they are the best lights for seeing at night that she has had on any car she has owned. I did wait a couple of weeks to write this review to be sure.