Would it be better to get the Juveloc injection, or the Mirajet or Potenza injection?

I am looking into the Juvereuk procedure, and I heard that the manual injection method minimizes drug loss and is the most effective. However, I am also conflicted because I hear that using devices like MiraJet or Potenza is less painful and delivers the medication more evenly. I would appreciate your recommendations on which method you received!