I bought the Kohler elevated toilet seat for my husband recovering from spine surgery. It arrived much sooner than stated. I installed the seat in 10 mins…I’m a senior woman with no handyman experience….the instructions 
were brief and easy to follow.  
The seat was a game changer for my husbands recovery!  Just that extra few inches provides an amazing difference!
The seat is not wobbly, very stable for everyday use.