I was not expecting them to be as tiny as they are. They are very difficult to put on and take off (if you have arthritic hands it will be impossible) and if you lose a back you won't be able to use them anymore since they are so uniquely made. Once on they are comfortable and I don't have the poke behind my ears anymore yay!  But because of the cost compared to size and difficulty of use they only get. 3.5 stars.
Update I will boost it to 4 stars because I forget they are on and I never am comfortable in earrings. I do still wish the gem was bigger or they had more style selection and the cost is high for them.