With the MAC's it definitely wasn't a question with installation although yes, lining up the needles to match the orginal spots was a pain in the ass and never happened. I wasn't satisfied also cause again they didn't maintain the factory green lighting. More like a soft blue lighting, also the mileage window wasn't tinted green like the factory it was blue. So again the mileage was lit blue not green - what a royal pain in the ass!!! Those NR white faces look so much better at night then the MAC's ever could.