A. The (pressed) wood seats that are manufactured are generally well made. Wood seats don't tend to "wiggle" much and should last 5 - 20 years (depends on usage and cleaning methods). If you drop the seat's lid (cover) a lot, the paint will wear off. Plastic seats come in many grades and thicknesses. The lower priced models have the potential of "wiggling" and may move slightly while you are sitting on them. We suggest that "if" you are going to purchase a plastic toilet seat, that you purchase a top quality slow closing seat with the sta-tight hinges for a little extra. The paint won't wear off and a good quality, slow closing plastic toilet seat with sta-tight hinges can't be beat. They're a little more expensive, but well worth the price.