As outlined below, Sculptra can be a terrific product to sculpt, lift and otherwise shape the face. What is most important is the techniques used and experience of the injector (as well as how good a candidate you are for the procedure). I rarely use cannulas, except for when I inject HA products to the upper lids, because I feel like I can achieve a better result with needles (ie gettting into different tissue layers, dissecting off wrinkles, etc) but cannulas can be helpful for many doctors. What is most important is the skill and experience of the injector. That said, very few injectors use cannulas for sculptra because of the larger particle size and need to volumize in different tissue planes but I know some excellent injectors who prefer cannulas even for sculptra. Find an experienced board certified "core" injector who has extensive experience with the product and let them worry about which technique to use. Injecting these fillers is an art as well as a science and sculptra particularly requires a finesse that can take years to perfect so make sure they are experts with this product,Best of luck!