I tried other fillers over the years and while several gave me good results initially, eventually I was always disapionted because those did not last very long.
I have done Sculptra several times. Several years ago, I had 5 treatments. Then, recently, three years after those first treatments, I had another two treatments to get back the volume I had lost over the three years. i did not think the initial treatments would last as long as they have.
I have had no problem with lumps or granuals, no problems at all. I am very pleased with the results and with the duration of the treatments. The only thing I can say is that the Doctor who preforms the procedure is crucial to the success of this product