are there studies suggesting latched boosters are better? I am assuming they are as the booster is not moving forward in an impact. The reason I am returning the monarchs (and buying frontierd) is because they weigh 15 pounds - more than a third of the weight of my little girl. She needs to move to something else because of torso height but I am scared of her sitting in a 15 pound unrestrained seat only held in by a seatbelt. Am I overreacting? And at 4 3/4 not sure I can trust her to sit perfectly all the time. I don't think I would be so concerned when doing inner city driving, but we frequently make long road trips (15 hours to inlaws) Incidentally both have always travelled great and been very comfortable in the Wizard and the boulevard. (Although I am extremely excited about cupholders and snackholders - I hope it will limit the amount of passing things back that I have to do!