Wanted to replace a seat that was also easy-off that would come detached too easily.  So a little gun-shy of buying another easy-off design.  This one stays put till you want to remove it, so good job.  The mount from the top option relies on expanding rubber plugs that grip onto the mounting holes.  I tried this mount but I didn't like how much the seat moved around, so replaced with the bottom mount option.  Pretty happy with that.  Seat is a little pricey, but good quality.