I've had restylane injected into my nasiolabial folds for the last three years and lips, more recently, and have been really happy with the results.
Recently, I went for a consultation and the derm team suggested putting some in my inner check area. I *love* the subtle plumping which has taken years off my face. One person I work with said that she was just thinking that I look so young for my years "like a teen"-- I'm nearly 40.
I've noticed that the filler in my nasiolabial folds lasts longer than in my lips. Since I just had the filler put in my cheeks it will be interesting to see how long it lasts there.