Voluma is an excellent product for cheek augmentation. It is FDA indicated specifically for this area. As far as how it affects the creepiness of the skin, it really depends on how thin and how loose the skin is. Voluma won't necessarily thicken the skin, but it will take up some of the laxity in the cheek area, which may help decrease the crepey look. A photo could really help further explain what you might expect after Voluma.
Voluma is FDA approved to fill and lift the mid face. Without seeing you in person or without seeing pictures, it is impossible to give you specific advice. However, in the studies on Voluma and in extensive experience, even with injections in the cheek area, positive effects were seen in areas not injected such as the nasolabial folds around the mouth and the tear troughs around the eyes. Off-label areas can also be injected, but this is at the discretion of your injector. If the areas you are looking to have treated are superficial, you may need combination injections with Voluma used in the deep areas of the cheeks and mid face and Juvederm, Restylane or Belotero in the more superficial levels of the skin. Good Luck.