This is an excellent toilet seat - both in comfort and in construction.  The only issue I found is when you slide the toilet seat onto the brackets and place the covers over the brackets, the toilet seat tends to come free of the brackets.  The solution I found was to super-glue the brackets onto the holder so when the toilet seat is slid onto the brackets, they are glued solidly and don't slips any longer.  You secure them to the toilet base with plastic screws and nuts.  I ordered two seats and now I'm going to order a third for my other bathroom.  Very good product.