I am a teacher who purchased these for a student to use so I have not used them myself, however, I would recommend these. They are easy to install and helped to make bathrooming more independent. The height easily adjusts, although the height only goes down an inch or two. On the lowest setting they lean slightly forward. I gave them 4 stars because they are a bit wobbly, but not enough to be unsafe. Once you apply pressure to shift from the wheelchair to the toilet, they feel secure.