At first I had collegen injected, but it only lasted 2 months. When Restylane came out, I switched to it. It lasts much longer. I have used Restylane for several years. I've had so much injected, that I don't have to get it redone now but once or twice a year. lol. I had practically no lips before the injectables. Now I love them. When I show people my old drivers liscence, they are shocked. Does it hurt, HELL YES. But only for a minute or 2 when the Dr. injects them. I would think about the implants so it would be permanent.