I can see some people would want more space around the rearview mirror with this in-place dimming, but we are very happy with the difference in comfort once it is in place all day in the parking lot at work. It's a little more awkward when set up for just one person, but it's like any sun visor. Luckily my husband and I drive to work together and it takes about 5 seconds to put it back together during the day.