Had both hi density bulbs go out separately after only a few week of being installed. Both were replaced without issue. When they discovered that the wrong bulb on the passenger side had been installed by accident, I received a call on the way home advising me of the error and set a time convenient for me to set it right. I probably wouldn't have noticed until much later while driving at night. Honesty from a company that makes it right is refreshing. I will trust them with my car in the future.