I bought them and tested them out. They are nice to have, but I found they show up in the camera view quite often. I decided that for me, using the automatic landing feature does a nice job of getting the X-Star down cautiously and then cutting the motors as soon as it alights. The extenders are also added weight. I personally am a bigger fan of using the prop guards which would also protect the motors in case of a fall-over after landing, but which also provide more safety to property and lives during flight potentially.