You're doing the right thing in researching the options. Unlike other reviews my dermatologist used 2 syringes and she placed the product not only in the folds but above & around to "lift" the skin. My face, from the eyes down was topically anesthetized so I had no pain, just little pricks. It took a little over 2 hours including the time to become numb. I am just under 50 and thrilled with the results. I bruised alot, but that's normal for me. Wish I had taken the Arnica before as well as after. About 2 years ago I had a different filler and it became lumpy - not this one. I think it's great, I just wish it didn't cost so darn much. It's also important to be confident in your provider, as well as the product you choose.