Toilet seat is comfortable and clearly well constructed.  This seat has two features that make it stand out.  First is the fact that it can be attached from the top using expansion plugs or through the toilet using bolts and nylon wing nuts.  Both methods work great.  I installed mine with the bolts and wing nuts.  My parents bought one that is installed with the expansion plugs.  Both are solid with no wobble or movement.  The second great feature is the quick removal system (using 2 push buttons) that allows for easy cleaning.