I like the X6, but here are the negative issues brought out in some of the reviews: 1) heavy, 2) seats only 4, 3) severe limited rear visibility, 4) expensive, 5) options also very expensive but also highly desireable, many of which should be included in the base vehicle from the beginning, and 6) low mileage. Some reviewers have also suggested it is visually unappealing, but that is in the eye of the beholder. My take: the big negatives are: rear seating for only 4, ultimate cost when optioned the way you want the vehicle, and rear visibility. All of these could have been addressed by BMW. The end result is that customers will look at alternatives...