20 years ago I installed two comfort rise toilets for my mom. As time went on and I needed two hip replacements (7 years apart), I found that I needed more rise and in the last 10 years have tried just about every one available. Some were okay, some were unstable, and some just didn't fit.  After deciding to spend a little more money for quality and looks, I found the Kohler Elongated seat. I purchased two. I am a 78 year old retired school teacher and installed both of them myself.  The first one took 20 minutes and the second one took 10 minutes. They look so much better than all of the other ones I have had. You may have to spend a little more, but it is worth it. Even my bridge playing friends approve of the change!