Just installed on our busiest toilet where we're also potty training 3 toddlers. It fits perfect, looks sleek, and feels comfortable. Our previous toilet seat cover was heavier and tend to fall on the kids when they move around on the seat. No issues with the American Standard - Traditional Elongated Luxury Toilet Seat. It is light weight, yet sturdy and doesn't feel or look cheap. 
The installation was easy and it was nice to have an option to either do top or bottom mount with the provided hardware. The only drawback for me is the hollow bottom part of the seat, more crevices to clean rather than a flat surface especially during potty training. [This review was collected as part of a promotion.]