The roller is well-made and fortunately comes with a case. If you get it and because you have to sanitize it after each use, I would suggest washing it with boiling water and then putting alcohol or disinfectant inside the case and leaving it like that for days until it evaporates, washing the case and repeating the same process. The instructions on the packaging are clear and will help you in its use. I can't say that I saw a difference with the ampoules on my face, but I don't care because essentially, I only wanted the roller. I use it consistently every night after showering when my pores are open. First, I apply serum or aloe directly from the plant (find the process on the internet), sometimes I also use balsam oil, but if you don't have authentic one from grandma (!), don't use it. After the first layer, I use the roller to push the serum inside and under the skin, then apply a second layer of serum and finally the cream. The process takes about 3 minutes at most.